Soak fresh ginkgo in water for 2 to 4 days. Only when the ginkgo is softened or rotted can the pulp be easily removed. Use a wooden stick to mash the pulp and rinse it in water to separate the skin and kernel of the ginkgo. Take out the nuts from them and dry them in the sun for later storage. This is a method of making a large amount of ginkgo. Nowadays, it is computer-programmed and mechanized.