1. Soak the picked fresh ginkgo in water for 7- 10 days. ?

2. After the skin and pulp are tender, pinch off the skin and pulp and keep the white stone, which is also commonly known as ginkgo. Wear gloves at this step to avoid contact with the skin.

3. Ginkgo biloba kernel contains a small amount of cyanosides, ginkgol and other substances, which has certain toxicity. Cook ginkgo at high temperature, peel off the shell, put the big head up, and squeeze out the ginkgo core. ?

4. Wash Ginkgo biloba, dry it in the sun or dry it in the sun, and finish the pretreatment.