1, scallion is the lily family, the genus onion, bulb aggregates, rectangular-ovate, narrowly ovate or ovate cylindrical; bulb outer skin reddish brown, purplish red to yellow-white, membranous or thin leathery, do not rupture. Leaves are hollow cylindrical, acuminate toward the tip, dark green, often slightly whitish. The plant is small, the leaves are extremely fine and tender, with a fresh, slightly spicy flavor, mainly used for flavoring and deodorizing. Native to western Asia. More widely cultivated in the south of China. Europe and some parts of Asia are also cultivated.

2, common onion belongs to the lily family, is a perennial herbaceous plant onion stems and leaves, the upper part of the green onion leaves, the lower part of the white onion white. Native to Siberia, China has a long history of cultivation, widely distributed, and Shandong, Hebei, Henan and other provinces as an important place of origin. According to the length of the white onion can be divided into two types, large onions and small onions. Large onion plant is tall, white onion white and sweet, cultivated more in the north. The use of green onions is a daily kitchen necessities, it can not only be used for flavoring products, but also against epidemics, can be described as a good vegetable medicine, mostly used for frying and cooking and deep-frying. The south produces small onions, is a common seasoning, usually raw or mixed with cold dishes.

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