1, depending on the color of perilla. Although the name is perilla, the leaves of perilla are not always purple. In China's ancient books, all green leaves are called perilla, also called water chestnut, and both sides of leaves are purple, or those with green faces and purple backs are called perilla, but there is no difference in taste between them.

2. Perilla leaves and ginger are ideal partners, both of which can dispel cold. When brewing, fresh perilla leaves can be collected and dried for two days, and then cut into filaments, and ginger is also cut into filaments. Both are put in a teacup, brewed with boiling water, and then drunk. Drinking in winter can prevent colds.