... China,such as Jiangsu, Jiangxi,Fujian, Shangdong, Henan, Shaanxi and Sichuan Province. We use the wild polygonum cuspidatum in Shaanxi Province ... China,such as Jiangsu, Jiangxi,Fujian, Shangdong, Henan, Shaanxi and Sichuan Province. We use the wild polygonum cuspidatum in Shaanxi Province ...