Sweet potato is a kind of food crop with high yield and strong adaptability, which is planted in most parts of China. Sweet potato is also called sweet potato, sweet potato, sweet storage, Zhu potato, Jin potato, Fanru, red yam, jade pillow potato, sweet potato, sweet potato, goose, sweet potato and so on. Sweet potato is millet, and the underground part is round, oval or spindle-shaped root. Sweet potato is native to South America and large and small Antilles, and is widely planted in tropical and subtropical areas all over the world. Sweet potato was first planted in Mexico and Colombia in Central America, and then brought to the Philippines and other countries by the Spanish. Sweet potato was introduced to China for the first time in Wanli period at the end of Ming Dynasty, and entered China from Yunnan, Guangdong and Fujian. Chen Zhenlong, a scholar in Ming Dynasty, was called "the father of sweet potato".