Chives are leeks are cultivated in the dark room inside, completely isolated from the light, due to the lack of sunlight supply, can not photosynthesize, can not synthesize chlorophyll, will become yellow, called "leeks", leeks are also called "leeks buds", "yellow leek buds", "yellow leek", commonly known as "leek white", for leeks by softening cultivation yellow products.

Leeks inside the nutritional value is very high, rich in protein, minerals calcium, iron and phosphorus, vitamin A original, vitamin B2, vitamin C, niacin, as well as glycosides and bitterness. But the nutritional value of Fei Huang is not as high as leeks.

The efficacy and function of leek is very much, with the seeds and leaves and other medicines, with the stomach, refreshing, stop sweating and astringent, tonifying the kidney to help the sun, and fixing the efficacy of semen, etc.. The pungent odor of leeks has the effect of dispersing blood stasis and activating blood circulation, promoting qi stagnation, and is suitable for bruises, regurgitation, enteritis, vomiting blood, chest pain and other diseases. Leek contains a lot of vitamins and crude fiber, can effectively prevent constipation. Chives can also be in the digestive tract of hair, gravel, metal shavings and even needles wrapped up, with the stool out of the body, so, leeks also have a "wash bowel grass," said.