King Jeongjo intended to replace Sinjeung Dongguk Yeoji Seungram by publishing Haedong Yeoji Tongjae. It combines National Eupjis which has been compiled several times since King Yeongjo"s time in Sinjeung Dongguk Yeoji Seungram. The National Eupjis Compilation Project during the reign of King Jeongjo may be classified into the first half and the second half as of June 1789, when those responsible for compilation are designated by province and items. According to the Gakdo Eupji compiled in 1780, 56 of the 61 are of the Yeojidoseo line, and five are of the Gyeongsangdo Eupji type. In response, King Jeongjo intended to publish a new type of the National Eupjis combining the Gakdo Eupji and Yeoji Seungram. The Dongguk Munheon Bigo was ordered to be revised, while the Gaeseongbu and Ganghwabu published the eupjis, and the Hongmungwan in 1786 was required to collect the eupjis of each county. In August 1787, the ‘Regulations on eupji" was established, and the government ordered the eupji compilation of two large counties for each province, but failed to produce any results. In the latter half of the reign of King Jeongjo, the eupjis were corrected according to certain guidelines based on eupjis and the central government"s various records. Lee Seo-gu practically led the project by assisting Jeongjo as a secretary. It was quickly corrected to Gyeongdo, Hanseongbu, Gyeonggi-do, Chungcheong-do, and Gyeongsang-do. In 1790, the west library of Gyujanggak had 46 books of Haedong Eupji, which were revised by the officials in charge and corrected by Lee Seo-gu. The project, which had been pushed back in priority, gained momentum in September 1792 when Lee Seo-gu returned as a secretary to the King Jeongjo. At the end of 1792, the regulations sent from Seungjeongwon were ordered to follow the Yeongnam-style and to revise them by imitating the examples in Yeoji Seungram if anything unreasonable was found. In Jeolla-do, some of the additional items were added based on the Andongbu Yeojiji(1786), and Honam Eupji was completed when Lee Seo-gu was the governor. The Honam Eupji type was a ‘perfect eupji type’ to replace the Sinjeung Dongguk Yeoji Seungram and reflected the ideal of King Jeongjo"s Haedong Yeoji Tongjae. The 60 volumes of the Haedong Yeoji Tongjae, the only manuscript at the end of King Jeongjo"s reign, were completed to some extent, but were not properly kept. Thus, traces of Haedong Yeoji Tongjae can be found only in Dongguk Yeoji Bigo and Honam Eupji.
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