1, water chestnut was first found in Luzon Island, China's Guangdong, Guangxi, Guizhou, Sichuan, Chongqing, Hubei, Hunan, Jiangsu, Shandong, Jiangxi, Fujian, Zhejiang, Taiwan, Hainan and other places are distributed, especially in Tuanfeng County, Hubei and Dangyang City, Guangdong, Lechang City, Shandong Province, Wenshang County and other places are the most famous, foreign countries are mainly distributed in the Ryukyu Islands, Japan, India, etc., mostly grow in swamps, paddy fields and It mostly grows in swamps, paddy fields and shallow streams and rivers.

2, water chestnut is China's characteristic cash crop, also known as horseshoe, water chestnut, eider gromwell, etc., in biological classification belongs to the plant kingdom, angiosperm phylum, monocotyledonous plants, gramineae, salviaceae, water chestnut genus of shallow water persistent herbaceous plants, China's southern regions are generally distributed, usually underground bulb for food, can be eaten raw, cooked or cooked, can also be made of canned food and starch extraction.