It doesn't matter if the shell is moldy, because ginkgo will be moldy as long as it is exposed to a little moisture in a sealed place, but its shell is hard and sealed, so there is generally no problem with the ginkgo fruit inside, and it can be used by removing the red film and core. Ginkgo biloba is difficult to preserve. Generally, it is easy to be moldy and airtight in plastic bags. It can be kept in the refrigerator for a long time if it is wrapped in newspaper.