Khumbu was first recorded in Wupu Bencao(, Wu Pu's Materia Medica) from the Wei period(220-265 A. D.), formerly known as "Lunbu" , Mingyi Bielu(, Alternative Records of Famous Physicians) began with "Kunbu" as the name of the drug, which has been used for generations. Nowadays, the original medicinal kelp is derived from Laminaria japonica Aresch. or Ecklonia kurome Okam. The kelp is mainly produced in the East China Sea region and North Korea according to early ancient herbal works. Today's kelp is mainly produced in Liaoning, Shandong, Zhejiang, Fujian, and Guangdong; Kunbu (chaese) is mainly produced in Zhejiang and Fujian. In addition to food, Khumbu has also been used as medicine for more than 2, 000 years.