Onion, alias: chive, continous onion, fire onion, four-season onion and fine rice onion. Allium belongs to Liliaceae and is a perennial herb. Onion stems and leaves, the upper part is cyan onion leaves, and the lower part is white onion white. Originated in Siberia, China has a long history of cultivation and is widely distributed, with Shandong, Hebei, Henan and other provinces as important producing areas. According to the length of scallion, it can be divided into two types, scallion and shallot. Onion plants are tall, white and sweet, and are cultivated in the north. Onion is a necessary thing in the daily kitchen. It can not only be used as seasoning, but also prevent and cure epidemics. It can be described as a good vegetable medicine, which is mostly used for frying. South China produces more shallots, which is a common seasoning, also called chives, and is usually eaten raw or mixed with cold dishes.

Onion, a kind of onion, is pungent and mild in nature, and has the functions of releasing yang, detoxifying and seasoning. Mainly used for symptoms such as wind-cold common cold, aversion to cold and fever, headache and nasal congestion, abdominal pain due to yin cold, dysentery and diarrhea, internal resistance of insect accumulation, milk obstruction, and unfavorable defecation. Welsh onion contains volatile oil, the main component of which is allicin, and also contains dienyl thioether and calcium oxalate. In addition, it also contains fat, sugar, carotene, vitamins B, C, nicotinic acid, calcium, magnesium and iron. People suffering from gastrointestinal diseases, especially peptic ulcer, should not eat more.