Yi Autonomous Prefecture Research Articles

Depression and sleep disorders among AIDS orphans in an HIV/AIDS high-epidemic area in China.

The Liangshan Yi Autonomous Prefecture is home to the largest population of Yi ethnic minority within mainland China. Due to the high HIV/AIDS epidemic, many Yi children become AIDS orphans who lost one or both parents to AIDS-related causes. This study explored the prevalence and correlates of AIDS orphans' depressive symptom, sleep disorders and their comorbidity. A cross-sectional survey was conducted to collect pertinent information from 467 AIDS orphans and 856 non-orphans of Yi ethnic minority. Depressive symptoms were screened by a two-item Patient Health Questionnaire (PHQ-2). The symptoms of insomnia were assessed by the Insomnia Severity Index (ISI), which was complemented by one item from the Pittsburgh Quality Sleep Index (PSQI) to measure the frequency of nightmare. The prevalence of depression (26.8% vs. 20.4%, P = 0.009) and comorbidity of depression, insomnia and nightmare (7.5% vs. 4.3%, P = 0.046) was significantly higher for AIDS orphans than for non-orphans. Risk factors such as ostracization and self-reported poor physical health had stronger effects on depressive symptoms and sleep disorders for AIDS orphans than for non-orphans. On the other hand, peer support, as an important protective factor, was significantly and negatively associated with depressive symptoms and sleep disorders for AIDS orphans. AIDS orphans of Yi ethnic minority reported higher levels of depressive symptoms and comorbidity of depression and sleep disorders than their non-orphan counterparts. These symptoms were exacerbated by ostracization and self-rated poor physical health but lowered by peer support.

Association and interaction between dietary patterns and gene polymorphisms in Liangshan residents with hyperuricemia

Hyperuricemia (HUA) is associated with dietary and genetic factors. However, studies on dietary patterns and their interaction effect with genes on the risk of HUA are limited. We aimed to explore the association between dietary patterns and HUA, and dietary patterns—gene interactions on the risk of HUA. A population-based cross-sectional study was conducted in adults aged 18 and older in Liangshan Yi Autonomous Prefecture of China. Dietary consumption was collected using a standard Food Frequency Questionnaire. Vein blood samples were collected after overnight fasting, and DNA was extracted from peripheral blood leukocytes. Dietary patterns were derived using principal component and factor analysis. Of the 2646 participants, the prevalence of HUA was 26.8%. Three dietary patterns were classified. Of them, a dietary pattern with higher meat consumption (defined as meat-based) had the strongest association with HUA than a dietary pattern with plant-based or local special diet-based. A higher frequency of T allele at ABCG2 rs2231142 and SLC2A9 rs11722228 loci was observed in participants with HUA than those without HUA. An additive interaction of meat-based dietary pattern with rs2231142 locus was significantly associated with an increased risk of HUA. The relative excess risks of interaction, attributable proportion of interaction, and synergy index (S) were 0.482 (95% CI: 0.012–0.976), 0.203 (95% CI: 0.033–0.374), and 1.544 (95% CI: 1.012–2.355), respectively. In conclusion, a dietary pattern with meat-based was significantly associated with an increased risk of HUA. There was an additive interaction between a meat-based dietary pattern and the ABCG2 rs2231142 locus. Individuals with rs2231142 T allele were at higher risk of HUA than those with rs2231142 GG allele.

Analysis of death causes of residents in poverty-stricken Areas in 2020: take Liangshan Yi Autonomous Prefecture in China as an example

BackgroundContinuous surveillance of death can measure health status of the population, reflect social development of a region, thus promote health service development in the region and improve the health level of local residents. Liangshan Yi Autonomous Prefecture was a poverty-stricken region in Sichuan province, China. While at the end of 2020, as the announcement of its last seven former severely impoverished counties had shaken off poverty, Liangshan declared victory against poverty. Since it is well known that the mortality and cause of death structure will undergo some undesirable changes as the economy develops, this study aimed to reveal the distribution of deaths, as well as analyze the latest mortality and death causes distribution characteristics in Liangshan in 2020, so as to provide references for the decision-making on health policies and the distribution of health resources in global poverty-stricken areas.MethodsLiangshan carried out the investigation on underreporting deaths among population in its 11 counties in 2018, and combined with the partially available data from underreporting deaths investigation data in 2020 and the field experience, we have estimated the underreporting rates of death in 2020 using capture-recapture (CRC) method. The crude mortality rate, age-standardized mortality rate, proportion and rank of the death causes, potential years of life lost (PYLL), average years of life lost (AYLL), potential years of life lost rate (PYLLR), standardized potential years of life lost (SPYLL), premature mortality from non-communicable diseases (premature NCD mortality), life expectancy and cause-eliminated life expectancy were estimated and corrected.ResultsIn 2020, Liangshan reported a total of 16,850 deaths, with a crude mortality rate of 608.75/100,000 and an age-standardized mortality rate of 633.50/100,000. Male mortality was higher than female mortality, while 0-year-old mortality of men was lower than women’s. The former severely impoverished counties’ age-standardized mortality and 0-year-old mortality were higher than those of the non-impoverished counties. The main cause of death spectrum was noncommunicable diseases (NCDs), and the premature NCD mortality of four major NCDs were 14.26% for the overall population, 19.16% for men and 9.27% for women. In the overall population, the top five death causes were heart diseases (112.07/100,000), respiratory diseases (105.85/100,000), cerebrovascular diseases (87.03/100,000), malignant tumors (73.92/100,000) and injury (43.89/100,000). Injury (64,216.78 person years), malignant tumors (41,478.33 person years) and heart diseases (29,647.83 person years) had the greatest burden on residents in Liangshan, and at the same time, the burden of most death causes on men were greater than those on women. The life expectancy was 76.25 years for overall population, 72.92 years for men and 80.17 years for women, respectively, all higher than the global level (73.3, 70.8 and 75.9 years).ConclusionsTaking Liangshan in China as an example, this study analyzed the latest death situation in poverty-stricken areas, and proposed suggestions on the formulation of health policies in other poverty-stricken areas both at home and abroad.

Analysis on migration of HIV/AIDS cases and related factors in Liangshan Yi Autonomous Prefecture in Sichuan province, 2020

Objective: To analyze the migration of the HIV/AIDS cases and related factors in Liangshan Yi autonomous prefecture (Liangshan). Methods: According to HIV/AIDS Comprehensive Response Information Management System of China Information System for Disease Control and Prevention, a total of 28 772 HIV/AIDS cases who had follow-up records in Liangshan in 2020 were included in the survey. The migration of the HIV/AIDS cases was described and the related factors were analyzed using multiple logistic regression models, and the migration destinations of the HIV/AIDS cases were mapped. Results: Among the 28 772 HIV/AIDS cases, 20.89% (6 010/28 772) had migration in 2020. Multivariate logistic regression analysis showed that among the HIV/AIDS cases, the migration related factors included being aged 15-24 years (compared with being aged 0-14 years, OR=2.74, 95%CI:2.04-3.69) and ethnic group (compared with Han ethnic group, OR=2.44, 95%CI:2.19-2.72), having education level of junior high school (compared with having education level of primary school or below, OR=1.25, 95%CI:1.14-1.38), being unmarried (compared with being married, OR=1.29, 95%CI:1.20-1.39), being engaged in business services (compared with being engaged in farming, OR=1.96, 95%CI:1.31-2.92), receiving antiviral treatment <1 year (compared with receiving antiviral treatment >3 years, OR=1.42, 95%CI:1.26-1.61), having recent CD4+T lymphocytes (CD4) counts >500 cells/μl (compared with having recent CD4 counts <200 cells/μl, OR=1.15, 95%CI:1.03-1.29). The geographical distribution maps showed that among all cities in Sichuan, Xichang (13.26%, 797/6 010) and Chengdu (10.12%,608/6 010) were the main migration destinations of the HIV/AIDS cases, and the provinces outside Sichuan where the HIV/AIDS cases would like to migrate to were mainly Guangdong (18.19%, 1 093/6 010) and Zhejiang provinces (7.67%, 461/6 010) in 2020. The HIV/AIDS cases who migrated where Liangshan, within Sichuan province, and to other provinces accounted for 27.67% (1 663/6 010), 15.34% (922/6 010) and 56.99% (3 425/6 010), respectively. Conclusions: More attention should be paid to the mobility characteristics and the classification management of HIV/AIDS cases according to their characteristics in Liangshan. Timely access to information on changes in the place of work and residence of HIV/AIDS cases should be warranted when they have migration. Good referrals and management for mobility of HIV/AIDS cases in different places should be made to reduce loss to follow-up and improving interventions.

The Yi People's Customs in Gao Xiaohua's Writings

Artist Gao Xiaohua is a young painter who has made outstanding contributions in the history of modern Chinese oil painting, and was once a representative of the "Sichuan School of Painting". He went to western China to find inspiration, chose the Yi people in Liangshan Yi Autonomous Prefecture, and completed a series of paintings about the Yi people. The group paintings of "Butuo People" and "Yi People" are oil paintings created by Gao Xiaohua with the theme of the Yi nationality. This article analyzes the artistic language of Gao Xiaohua's paintings from the group paintings of "Butuo People" and "Yi People", in order to understand his painting style and to explore the social and historical value and artistic value of his oil paintings.

Achievements, experiences and challenges of the battle against poverty in China\u2019s ethnic minority areas: focusing on the \u201cthree areas and three prefectures\u201d

The incidence of poverty in three of China’s provinces (Qinghai, Guizhou and Yunnan) and five of its autonomous regions (Inner Mongolia, Guangxi, Tibet, Ningxia, and Xinjiang) is greater than the national average. As severely impoverished areas in China and top priorities in the country’s battle against poverty, ethnic minority areas, especially the most impoverished “three areas” (the Tibet Autonomous Region, prefectures and counties with large Tibetan populations in the provinces of Qinghai, Sichuan, Gansu and Yunnan, and the Hotan, Aksu, Kashgar prefectures and Kizilsu Kirgiz Autonomous Prefecture in southern Xinjiang) and the “three prefectures” (the Liangshan Yi Autonomous Prefecture in Sichuan Province, the Nujiang Lisu Autonomous Prefecture in Yunnan Province, and the Linxia Hui Autonomous Prefecture in Gansu Province) showed a significant reduction in poverty and achieved decisive progress in poverty elimination from 2018 to 2019. This laid a solid foundation for the building of a moderately prosperous society in an all respects by 2020. By reviewing and explaining methods and measures of targeted poverty alleviation used in ethnic minority areas of China, this paper summarizes the most successful experiences of these areas, particularly the “Three Areas and Three Prefectures”, in the process of alleviating poverty and building a moderately prosperous society in all respects. These successful experiences consist of four aspects: roles of national systems, promotion of key poverty alleviation efforts, improved mechanisms and systems for targeted poverty alleviation, and specific innovative methods and measures. While examining the difficulties of eliminating poverty and building a moderately prosperous society in all respects in China’s ethnic minority areas, especially in the “Three Areas and Three Prefectures”, this article also discusses practical challenges and problems yet to be solved, such as follow-up adjustments of poverty alleviation policies, cultivation of self-development capacity and weak educational foundations. Ultimately, this paper offers relevant solutions and suggestions in relation to macro policies, government officials and impoverished groups.

Varieties Matter When Planning for Poverty Alleviation and Ecological Restoration in Karst Fruit Cultivation Areas

Landscapes are increasingly being managed to meet multiple objectives and balance social, economic, and environmental goals. The Honghe Hani and Yi Autonomous Prefecture in the Yunnan faulted Basin represent examples of areas with a range of concerns, including balancing farming with poverty alleviation, economic development, and ecological protection. Here, we set out four future land-use scenarios to quantify and map the values of key evidence-based, policy-relevant ecosystem services in three typical counties in this area. We found that implementing existing fruit-growing plans may increase the expected total value of ecosystem services due to increased acreage, but it does not actually increase the total value of ecosystem services per unit area. For example, total ecosystem service provision in Jianshui County decreased by 3% by 2023 under the current trend after the expansion of the planting area was subtracted. However, planting fruit trees with better ecological benefits in areas of greater degradation risk, can increase the delivery of ecosystem services by 10–20%. Thus, variety coordination based on detailed study of the geographical contexts and ecological-economic performance of different types of fruit cultivation can produce ecological-economic improvements beyond simple expansion and better inform county-scale policy, planning, and management interventions.

The Crux, Root Cause and Governance Path of "Small City Disease" —— A Case Study of Liangshan Yi Autonomous Prefecture

Urban diseases refer to a series of acute urban problems that restrict healthy urban development in the urbanization process. As China has urbanized, many small cities have fallen into a development dilemma and even experienced a recession in their urban development. This paper examines "small city disease" in the context of Liangshan Yi Autonomous Prefecture in Sichuan Province, and finds that the symptoms of "small city disease" include labor force losses, capital losses, insufficient public service resources, fewer employment opportunities, and the generalization of human feelings in Liangshan Yi Autonomous Prefecture. Then, this paper proposes developing endogenous superior industries, strengthening regional cooperation, promoting system and mechanism reform, and being innovation with regard to cities’ approach to urban development, in order to successfully combat the increasingly serious "small city disease".

Hepatitis E in 24 Chinese Cities, 2008-2018: A New Analysis Method for the Disease's Occupational Characteristics.

Background: The disease burden of hepatitis E remains high. We used a new method (richness, diversity, evenness, and similarity analyses) to classify cities according to the occupational classification of hepatitis E patients across regions in China and compared the results of cluster analysis.Methods: Data on reported hepatitis E cases from 2008 to 2018 were collected from 24 cities (9 in Jilin Province, 13 in Jiangsu Province, Xiamen City, and Chuxiong Yi Autonomous Prefecture). Traditional statistical methods were used to describe the epidemiological characteristics of hepatitis E patients, while the new method and cluster analysis were used to classify the cities by analyzing the occupational composition across regions.Results: The prevalence of hepatitis E in eastern China (Jiangsu Province) was similar to that in the south (Xiamen City) and southwest of China (Chuxiong Yi Autonomous Prefecture), but higher than that in the north (Jilin Province). The age of hepatitis E patients was concentrated between 41 and 60 years, and the sex ratio ranged from 1:1.6 to 1:3.4. Farming was the most highly prevalent occupation; other sub-prevalent occupations included retirement, housework and unemployment. The incidence of occupations among migrant workers, medical staff, teachers, and students was moderate. There were several occupational types with few or no records, such as catering industry, caregivers and babysitters, diaspora children, childcare, herders, and fishing (boat) people. The occupational similarity of hepatitis E was high among economically developed cities, such as Nanjing, Wuxi, Baicheng, and Xiamen, while the similarity was small among cities with large economic disparities, such as Nanjing and Chuxiong Yi Autonomous Prefecture. A comparison of the classification results revealed more similarities and some differences when using these two methods.Conclusion: In China, the factors with the greatest influence on the prevalence of hepatitis E are living in the south, farming as an occupation, being middle-aged or elderly, and being male. The 24 cities we studied were highly diverse and moderately similar in terms of the occupational distribution of patients with hepatitis E. We confirmed the validity of the new method on in classifying cities according to their occupational composition by comparing it with the clustering method.

Mineralogical Characteristic of Nanhong Agate with Black Seaweed Pattern Mineral Inclusion

Nanhong from Liangshan Yi Autonomous Prefecture of Sichuan Province, China has gained great popularity in the gem market in China for its vibrant colour. Its attractive orange-red colour is generated by fine hematite concentrations. Recently, a new kind of named seaweed pattern agate, belonging to the family of the Nanhong agates appeared in the local market of Liangshan Prefecture. Microscopic examination showed that the fine red and black grain minerals scattered in various forms such as silkiness and disseminated forms in the sample. Infrared spectrometer, Raman spectrometer and X-ray powder diffraction were used to study the gemmological and mineralogical characteristics of the The results proved that the main mineral component of the was quartz with a low relative content of moganite and high degree of order. The crystallinity of the is about 6.76. FTIR spectra showed a weak peak at 3 674 cm-1 related to OH-. Combined with the XRD testing result (d=8.418 A), it supported the existence of phyllosilicates in the Raman spectrum of red grain mineal showed peaks at 226, 245, 292 cm-1, which matched well with hematite. Meanwhile the spectrum of black grain was consistent with sulfide minerals (peaks at 342, 377 cm-1). Further testing results of scanning electron microscopy and back scattering diffraction confirmed that most of the black grain mineral is pyrite(FeAs(0.015-0.018 5)S(1.826-1.886)), which belongs to isometric system. According to Raman database, the last peak at 289 cm-1 was identical with chalcopyrite. All these evidence showed pyrite had a paragenetic relationship with chalcopyrite in some area of seaweed pattern agate. Another important features were that mineral components and morphological distribution of these black grains were obviously different from features such as Fe and Mn oxides and organic grains that appear in common seaweed pattern from other places, which may indicate that the origin of seaweed pattern agate is from Liangshan.

Factors Associated With HIV-Related Stigma Toward People Living With HIV Among Nurses in Liangshan Yi Autonomous Prefecture, China: A Cross-Sectional Study.

Background: The Liangshan Yi Autonomous Prefecture has one of the most serious human immunodeficiency virus (HIV) epidemics in China. Evidence shows HIV-related stigma toward people living with HIV (PLWH) among nurses impedes HIV prevention and treatment. However, only limited research about HIV-related stigma toward PLWH from the perspective of nurses in Liangshan has been conducted.Objective: This study aimed to assess HIV-related stigma toward PLWH among nurses and determine factors associated with it in Liangshan, China.Design: We conducted a cross-sectional survey using a stratified, random cluster sampling method.Participants: Registered nurses (N = 1,248; primary hospitals = 102, secondary hospitals = 592, tertiary hospitals = 554) who were aged 18 or older, worked in the selected hospitals for at least 6 months, and consented to participate were recruited.Methods: All participants completed an anonymous online survey measuring sociodemographic characteristics, HIV-related stigma and HIV knowledge. We used multiple stepwise regression analysis to examine factors associated with HIV-related stigma toward PLWH among these nurses.Results: The mean score of HIV-related stigma among nurses was 50.7 (SD = 8.3; range 25–78). Nurses who were more experienced, had higher levels of education, and were working in tertiary hospitals reported higher level of HIV-related stigma. Those who had better HIV knowledge, reported a willingness to receive HIV-related training, were working in areas that had a high prevalence of HIV, had prior experience working in AIDS specialized hospitals, and worked in hospitals that had policies to protect PLWH showed a lower level of HIV-related stigma toward PLWH.Conclusions: Our findings suggested that providing culturally congruent education and training about HIV and care, and having hospitals that promoted policies protecting PLWH, may reduce HIV-related stigma toward PLWH among nurses in China.

Genetic polymorphism of 19 autosomal STR loci in the Yi ethnic minority of Liangshan Yi autonomous prefecture from Sichuan province in China

The Yi is one of fifty-six ethnic populations and one of the most ancient ethnic groups in China. The Liangshan Yi Autonomous Prefecture (LYAP) in Sichuan Province has the single largest Yi community in China. To establish a Yi population database in the LYAP of Sichuan in China, a Goldeneye™ DNA Identification System 20A Kit with 19 autosomal STRs (short tandem repeats) was used. As a result, the total discrimination power (TDP) and the cumulative probability of exclusion (CPE) for these STRs in 1016 unrelated individuals were 0.999999999999999999999897 and 0.9999999597, respectively. Totals of 273 alleles for 19 STRs and 8–22 alleles for each locus were found. The allelic frequencies ranged from 0.0005 to 0.5084. The forensic parameter averages of these STRs were as follows: observed heterozygosity (Hobs) of 78.44%, expected heterozygosity (Hexp) of 79.89%, discrimination power (DP) of 92.66%, and probability of exclusion (PE) of 57.68%. Penta E presented the highest levels of Hobs and DP, whereas TPOX showed the lowest Hobs and DP values. Nei’s standard genetic distance matrix among 31 populations found that the nearest genetic distance to the Yi population was the Sichuan Han (0.0056). Altogether, we first reported the forensic parameters and allele frequencies of 19 autosomal STRs of the Yi group in Liangshan. These 19 STR makers could provide highly informative polymorphisms for individual identification, paternity testing and genetic population analyses.

Soil Sampling Spacing Based on Precision Agriculture Variable Rate Fertilization of Pomegranate Orchard

ABSTRACT Variable rate fertilization is one of the core technologies of precision agriculture, and it is particularly important to develop a representative field sampling scheme with less workload. A grid sampling of 1 m × 1 m was conducted on a pomegranate garden of 414 m2 in Nanzhuang Town, Jianshui County, Honghe Hani and Yi Autonomous Prefecture, Yunnan Province, and set up 7 groups of sample point deletion schemes to study the reasonable sampling spacing of soil nutrients. Based on the grading standard of soil nutrients in plow layer, the distribution of soil nutrients was statistically analyzed by using classical statistical methods to reveal the spatial distribution variability of soil nutrients. We then utilized a geostatistical method to interpolate the soil nutrient to obtain the soil nutrient distribution map, and compared the soil nutrient distribution map of the deletion sampling scheme with the original sampling scheme A in shape and area. Results revealed that the deletion scheme E was the most consistent with the sampling results of the full coverage sampling scheme A, and the number of soil sampling could be reduced by half under the premise of meeting the requirements of precise fertilization. The field experiment showed that the variable rate fertilization could save 26%, 54% and 34% nitrogen, phosphorus and potassium fertilizer compared with the farmers’ conventional fertilization, the total yield of soft seed pomegranate increased by 41.52%, and the sugar content, sugar–acid ratio and vitamin C content of pomegranate grain increased by 11.79%, 51.26% and 31.59%. The results also provide support to determine sampling spacing, spatial variability of soil nutrients and variable rate fertilization in precision farming.

Influencing factors on the death of HIV/AIDS patients treated with antiviral treatment in Butuo county, Liangshan Yi Autonomous Prefecture, 2010-2019

Objective: To understand influencing factors on the deaths of HIV/AIDS patients receiving antireviral treatment in Butuo county of Liangshan Yi Autonomous Prefecture (Liangshan) from 2010 to 2019, to provide data for drug replacement and sustainable antiviral treatment strategy. Methods: A matched case-control study was used to collect basic and follow-up information on AIDS death patients receiving antiviral treatment in Butuo county of Liangshan from 2010 to 2019. The control group was formed by sampling twice the number of cases. The logistic regression model was used to analyze the risk factors affecting mortality. Results: In 3 355 patients of HIV/AIDS treated with antiviral therapy, 1 179 cases in the death group and 2 176 cases in the control group. Including 81.34% were 30-49 years old, 69.09％males, 99.55% Yi nationality, 91.12% were married or cohabitated, 95.77% had junior high school education or below, and 88.41% peasants. Amultivariate logistic stepwise regression model showed that among the death risk factors, age ≥50 years old was 5.08 times (95%CI:3.05-8.48) that of the 18-29, female was 0.70 times (95%CI: 0.52-0.94) than male, the transmission rate of intravenous drug use was 1.43 times (95%CI: 1.06-1.91) that of heterosexual transmission, CD4+T lymphocyte (CD4) count ≥350 cells/μl before treatment was 0.38 times (95%CI: 0.30-0.48) that of CD4 <200 cells/μl before treatment, the most recent antiviral treatment regimen containing LPV/r was 0.04 times (95%CI: 0.01-0.18) than that of stavudine (d4T) + lamivudine (3TC) + nevirapine (NVP)/efavirenz (EFV) regimen, drug resistance was 3.40 times (95%CI: 2.13-5.42) of non-drug resistance, non-viral load and non-drug resistance test results were 12.98 times (95%CI: 10.28-16.40) of non-drug resistance. Conclusions: Age, gender, transmission route, CD4 before treatment, the latest antiviral treatment program, and drug resistance test after antiviral therapy were the influencing factors of HIV/AIDS death in Butuo county. It is necessary to expand the coverage of viral load and drug resistance test to change the antiviral therapeutic schedule scientifically and carry out publicity and education on the compliance of patients with antiviral treatment and medical staff training in order to reduce the mortality of patients with antiviral treatment.

Genetic reconstruction and phylogenetic analysis by 193 Y-SNPs and 27 Y-STRs in a Chinese Yi ethnic group.

Yi is the seventh-largest ethnic group in China and features mountainous regional characteristics. The Liangshan Yi Autonomous Prefecture is the largest Yi agglomeration with isolated geographical conditions, profoundly impeding genetic communication. Here, we investigated 427 unrelated males of Liangshan from 193 Y-chromosome single nucleotide polymorphisms (Y-SNPs) and 27 Y-chromosome short tandem repeats (Y-STRs) to reveal the genetic structure and paternal phylogeny of the group. The haplogroup diversity reached 0.9169 with 46 different subhaplogroups by 193 Y-SNPs, and the haplotype diversity reached 0.9999 by 27 Y-STR loci. Multidimensional scaling (MDS), N-J tree, and Network were constructed to decipher and visualize the genetic relations between Yi and worldwide groups. Our results revealed: (1) the Network by Y-STRs and Y-SNPs showed the haplogroup D1a1a-M15 in the Liangshan Yi population was a ramification of Tibetan groups' expansion from west to east on the plateau; (2) the haplogroup distribution and the mismatch mutation analysis indicated the haplogroup O2a2b1a1a1a4a2-Z25929 of Liangshan Yi derived from manifold Southeast Asian immigrants; (3) a high-resolution Y-SNPs panel is vital to depict accurate paternal derivations and build an integrated and refining genetic structure of ethnic groups.

Monitoring of the Fire in Muli County on March 28, 2020, based on high temporal-spatial resolution remote sensing techniques

Wildfires are serious natural disasters, and fire monitoring has become an important task for the protection of forest resources. Remote sensing technology has become one of the most commonly used tools for wildfire monitoring and fire point identification. However, single-source remote sensing data cannot meet the fire monitoring requirements of temporal resolution and spatial resolution simultaneously, which affects the efficiency and timeliness of monitoring. With the wildfire in Wakeliangzi, Xiangjiao township, Muli county, Liangshan Yi Autonomous Prefecture, Sichuan Province, China, on March 28, 2020 as the study object, fire monitoring was carried out based on a collaboration of multi-source remote sensing data acquired by the Sentinel-2 satellite, Landsat-8 satellite and the GF-4 satellite. Based on the integrated shortwave and infrared bands of the Sentinel-2 satellites, which were sensitive to fire information, the fire patch was analyzed. The normalized differential vegetation indexes (NDVIs) and normalized burn ratios (NBRs) were calculated before and after the fire, and then, the burned area and fire severity were calculated based on the obtained NDVIs and NBRs. We performed time series monitoring of the fire points based on the remote sensing data acquired by the GF-4 satellite with a high temporal resolution. Moreover, according to the remote sensing data in the medium-wave infrared band, which is sensitive to fire information, the wildfire point was located based on the smoke screen and temperature. Lastly, we calculated the vegetation coverage based on the data from the Sentinel-2 satellites and analyzed the relationship between vegetation coverage and fire severity. With the remote sensing data acquired by the Landsat-8 satellites in the integrated shortwave and infrared bands, the spatial distribution of the fire patch was quickly and effectively obtained. The total burned area reached 180.37Km2, 117.24Km2 of which had a low fire severity, 27.05Km2 featured a medium fire severity and 45.09Km2 had a high fire severity. Compared with the results of manual visual interpretation and cross validation of published results, the recognition accuracy of different fire areas is better. The multispectral data and medium-wave infrared band data acquired by the GF-4 satellite enabled us to locate the fire point and monitor the dynamic time series of the fire. The linear regression showed that the vegetation fractional cover (VFC) was significantly correlated with the relative differenced normalized burn ratio (dNBR). By combining the high temporal-spatial resolution remote sensing data acquired by the Sentinel-2 satellites and the GF-4 satellite, wildfires can be dynamically monitored and quantitatively analyzed, thereby achieving precise, macro-level fire monitoring. The findings in this study not only provide information for the Muli fire, but the results also offer a technical reference for wildfire remote sensing monitoring and emergency response.

Measurement of Urban Expansion and Spatial Correlation of Central Yunnan Urban Agglomeration Using Nighttime Light Data

The Central Yunnan Urban Agglomeration (CYUA) is an important zone of western development in China. The clarification of the spatial structure and changing trends in CYUA could help promote the coordinated development of the CYUA and enhance the overall competitiveness of the region. Based on data from the Yunnan Statistical Yearbook and the nighttime light data, this paper extracts the urban built-up area of the CYUA and analyzes the urban expansion and urban spatial connection intensity of the CYUA from 2000 to 2018 by using the urban gravity center model and the gravity model. The results show the following: (1) From 2000 to 2018, the urban built-up area of the CYUA expanded rapidly, and the urban built-up area increased by 369.35%, with Kunming accounting for 45.41% of the increased area. Kunming was the main contributor to the increase in the urban built-up area in the CYUA. From 2000 to 2018, the urban built-up areas of the CYUA were scattered in various mountain basins. (2) Overall, the urban gravity center of the CYUA has moved to Kunming, and the distance of the urban gravity center has increased since 2005, indicating that urban expansion has accelerated since 2005. (3) The development of the CYUA is extremely unbalanced. The urban spatial connection intensity between Kunming city, Yuxi city, and Qujing city, and Yi Autonomous Prefecture of Chuxiong is relatively strong, while the urban spatial connection intensity among cities other than Kunming is weak. Overall, the CYUA is characterized by stellar radiation with Kunming city as the core and Yuxi city as the secondary core.

Study on the Influence of Yi Handmade Embroidery and Fast Fashion Clothing Combined Development on the Achievements of Poverty Reduction in Liangshan Area

Liangshan Yi Autonomous Prefecture, located in the southwest of Sichuan Province, is China’s largest Yi ethnic community and one of the country’s concentrated contiguous areas of deep poverty. On February 11, 2018, General Secretary Xi Jinping visited the poor people in the hinterland of Daliang Mountain and discussed with local officials and people on targeted poverty alleviation measures. In November 2020, the last seven state-level poverty-stricken counties in Liangshan Yi Autonomous Prefecture announced the elimination of poverty, thus eliminating all poverty-stricken counties in Sichuan Province. This is a historic moment for Liangshan Prefecture, a historic moment for Sichuan Province, and also a historic moment for China’s poverty alleviation. In this paper, the combination of Yi’s handmade embroidery and fast fashion clothing is of great practical significance to help Liangshan consolidate and expand the achievements of poverty alleviation.

Research on the Present Situation and Development Strategy of Jiajiagou Village in Puge County

This study starts from the rural planning and design problems of Jiajiagou Village, Puge County, Liangshan Yi Autonomous Prefecture, Sichuan Province. Based on the analysis of its spatial texture, this study analyzes the current situation of its industrial development, infrastructure construction, cultural construction and other aspects in combination with the basic situation of the investigation. Through various investigations and studies, this paper revealed the planning and design effects and further interpreted existing problems of Jiajiagou Village, and targeted and effective suggestions were put forward to promote the development of Jiajiagou Village, so as to provide certain theoretical reference for the application of rural revitalization strategy in remote ethnic minority areas.

Socioeconomic development evaluation for Chinese poverty-stricken counties using indices derived from remotely sensed data

ABSTRACT Comprehensively and objectively evaluating the development of poverty-stricken counties is important for poverty alleviation. In this study, we propose a relatively objective and efficient method that utilizes indicators derived from remote sensing images to assess the socioeconomic development of poverty-stricken counties. Four indicators representing the area of developed land, area of forest vegetation cover, area of cultivated land, and average nighttime light intensity were integrated via the entropy method and used to construct a model for evaluation of the socioeconomic development of poverty-stricken counties (ESDPC). Then, 42 impoverished counties in Henan Province and Liangshan Yi Autonomous Prefecture of Sichuan Province in China were selected, and their ESDPC values for 2013, 2015, and 2017 were estimated. The average ESDPC value of the selected poverty-stricken counties increased from 0.29 to 0.34 between 2013 and 2017. The accuracy of this estimate was verified through an assessment based on the comprehensive development index (CDI) model constructed using 10 socioeconomic indices. The correlation coefficient between the ESDPC values and the CDI values was 0.60, and the fitting relationships between the two models and the remotely sensed indicators showed good consistency, indicating the potential for use of these remotely sensed indicators to assess regional socioeconomic development.