Suanjiao is a tropical fruit, also known as Suanjiou, Tamarind, Prunus mume (Hainan), "Muhan" (Dai), Suanjiao, Mahuang, Tianmukan, Tongxuetu and Asiatic ginseng fruit. Mainly distributed in Jinsha River, Nujiang River, Yuanjiang dry-hot valley and Xishuangbanna, Yunnan Province, the pulp is rich in sugar, acetic acid, tartaric acid, formic acid, citric acid and other components, and also rich in calcium, phosphorus, iron and other elements, among which the calcium content ranks first among fruits, but it is very sour. Yunnan people make sour corn cakes, which improves the palatability of sour corn.

this is what the fruit of Suanzao looks like.