Peel it off. Asparagus has a characteristic that it is easy to age during storage. Basically, if it is stored for one night, its skin will slowly lignify from the root, but asparagus usually bought in the market has been stored for several days, because removing its old skin before cold salad can better ensure the fresh and tender taste of asparagus and make it more refreshing to eat. Rich in vitamins and amino acids. It can be eaten as a vegetable or processed into a can. Delicious, tender and delicious. It has certain curative effect on heart disease, hypertension and other diseases, and the fleshy root has diuretic effect. It is considered as a healthy food.