"Rhizoma Corydalis Decumbentis" is a Chinese herbal medicine originated in yujiang county County, Jiangxi Province. Because its overground part withered, it was not easy to find in early summer, so it was named "Nothing in Summer". Modern medical research has proved that tuber of Rhizoma Corydalis Decumbentis contains chemical components of promoting blood circulation, dredging collaterals, promoting qi circulation and relieving pain, and has remarkable curative effect on rheumatoid arthritis, traumatic injury, stroke and hemiplegia. The recorded history of drug use in yujiang county county can be traced back to the Eastern Han Dynasty. Yujiang county County is the largest summer-free planting area in China. In 2008, the artificial planting area reached more than 2,000 mu, with an annual output of more than 450 tons of medicinal materials. .
The protection scope of products without geographical indications in yujiang county County in summer covers yujiang county County 13 townships in Jiangxi Province, including Dengbu Town, Yangxi Township, Ma Quan Town, Chuntao Township, Pingding Township, Huangxi Town, Jingjiang Town, Huang Zhuang Township, huaqiao town, Gaogongzhai Forest Farm, Honghu Township, yujiang county County Rice Seed Farm and Liujiazhan Reclamation Farm. .