1. Short-term storage: fresh Sophora japonica flowers are dried, put into plastic bags, tied tightly and put into the refrigerator, and can be stored for one week. 2. Dry storage: Wash fresh Sophora japonica with water, blanch with hot water, and dry in a cool and ventilated place. Then put the dried Sophora japonica in a plastic bag, tie it tightly, put it in a dry place, and take it out and blanch it in water when you want to eat it.

Sophora japonica, also known as Sophora japonica, refers to flowers and buds of leguminous plants in a broad sense, but generally open flowers are called "Sophora japonica" or "Sophora japonica" and buds are called "Sophora japonica". It is often planted near houses and roadsides, and is widely cultivated in China, mainly distributed in the north, mainly in the Loess Plateau and the North China Plain. It usually blooms in April and May every year, and the flowering period is about 10- 15 days.