If you want to preserve the fragrance when collecting osmanthus fragrans, you can freeze it. Soak fresh osmanthus in light salt water, clean it, put it in a sealed plastic bag, and then put it in the refrigerator for freezing, so that it can be taken at any time and will retain its fragrance. It can also be dried and sealed, and the dried osmanthus can be stored in a sealed bag for a long time. In addition, it can also be made into osmanthus nectar.