1. Wash the fresh Sophora japonica _, choose the Sophora japonica which is not completely open to dry, start to quickly blanch, and take it out after discoloration. It should be placed on a sieve to control moisture and dried. When it dries, it can be put away. It can be put in a fresh-keeping bag for easy use.

2. Fresh Sophora japonica should not be washed with water. It should be put directly into a plastic bag, tied tightly and put in the freezer, which can be kept for a week. If you don't put it in the refrigerator, you can put it in a basket, cover it with a wet cloth, put it on a cool ground, or store it for a few days.

3. Wash the fresh Sophora japonica with clear water, then blanch it with hot water, or not. Then put Sophora japonica in a cool and ventilated place to dry the moisture on the surface, put it in a plastic bag and store it in the freezer of the refrigerator, which can be stored for about half a year. Take it out when eating and melt it in warm water. It tastes delicious.