Heavy metals exceed the standard. Hunan Province, referred to as "Xiang" for short, is the provincial administrative region of People's Republic of China (PRC), bordering Jiangxi in the east, Chongqing and Guizhou in the west, Guangdong and Guangxi in the south and Hubei in the north. Experts believe that Hunan's unique geographical conditions are closely related to the layout of the historical process. Hunan is a famous hometown of nonferrous metals in China, and the background value of heavy metals in the soil is already relatively high. In addition, non-ferrous metallurgical and chemical mines with serious water pollution cannot sell rice produced by this soil.