Douguazi is called beans in Mandarin. According to the query of relevant public information, Douguazi is a local dialect, also known as cowpea, also known as beans, long beans, belt beans, skirt beans, and Douguazi. It is a twining herbaceous plant of the Fabaceae family, Canava genus, with slightly curved pods, mainly Distributed in the area south of the Yangtze River in my country.