Green kumquat (also known as tangerine, tangerine, tangerine, green tangerine) English: lime, Hainanese people commonly known as Gongsun tangerine, tangerine or sour tangerine, Taiwan people called kumquat, Singaporeans are called sour citrus, used to do sour citrus water for sale; for the Rutaceae family of citrus kumquat genus, the size of the smaller, an average of about 15 grams.

The green kumquat is rich in vitamin C. Regular consumption of kumquat can improve the body's immunity and enhance resistance to disease. Not only that, but eating some when it's cold can also prevent colds from occurring. Green kumquat contains a large number of vitamins and carotene, can play a cough and phlegm, asthma effect. It can also eliminate fatigue to some extent.

The kumquat itself belongs to a kind of fresh fruit, usually use kumquat water can be effective in regulating qi and depression, phlegm and cough, and has the effect of eliminating food and sobering up. Often drink kumquat water can be absorbed which is rich in di-glucosyl apigenin, so that there is a certain lower blood pressure, lower blood fat effect, and can enhance the body's ability to resist cold, can prevent colds. It can also accelerate the discharge of cholesterol in the body, which can play a role in lowering blood pressure, lowering the role of blood lipids, and has the effect of clearing heat and suppressing cough.