Mume, commonly known as "sour plum", is also called "green plum". Plums are smoked from immature plums. Mume is sour. Has the effects of promoting fluid production, quenching thirst, clearing away heat, relieving cough, expelling parasites and inhibiting bacteria.

The fruit of ebony contains organic acids such as malic acid, succinic acid and citric acid. Seeds contain cyanosides and fatty oils. Therefore, dark plum has the functions of promoting fluid production to quench thirst, clearing away heat and relieving cough, expelling worms and inhibiting bacteria.

Mume can inhibit Escherichia coli, Shigella dysenteriae, Pseudomonas aeruginosa and various skin fungi. Therefore, eating more dark plums in summer can reduce the occurrence of intestinal diseases and increase the body's immunity. In addition, dark plum can decompose lactic acid and fire into acid in muscle tissue, and eating dark plum can relieve fatigue and be full of energy; Mume also contains a small amount of picric acid, which can make gallbladder contract and promote bile secretion. In hot summer, it is best to drink more dark plum juice and sour plum soup, which can not only prevent heatstroke and cool down, but also prevent diseases and keep fit.