Suanmeitang or Sour prune drink is a traditional Chinese beverage made from sour plums (specifically, smoked Chinese plums), rock sugar, and other ingredients such as sweet osmanthus. Due to the sour plums used in its production, suanmeitang is slightly salty in addition to being sweet and rather sour.

Suanmeitang is commercially available in China, Taiwan, and other parts of the world with Chinese communities. It is often drunk chilled during the summertime, as relief from the heat, and is one of the most common summer drinks in China. In addition to being widely considered an effective drink for cooling off in the heat, it is also popularly believed to have minor health benefits, such as improving digestion and possibly inhibiting the buildup of lactic acid in the body.

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