Hanshou county. There are many pigs in Hanshou County, Changde City, Hunan Province. Raising pigs is an agricultural production activity, which mainly realizes the function of eating by raising pigs. Pig industry is an important agricultural industry in China, which plays an important role in ensuring the safe supply of meat food. The pig industry in China is changing from traditional pig industry to modern pig industry, and the breeding mode, regional layout, production mode and production capacity have all changed significantly.