1, spiny old steamed buns can be blanched and frozen, blanched and pickled, or dried and made into dried vegetables, and soaked in water when you want to eat. Fresh food stored in the refrigerator for a week will taste much worse if it is stored in other ways.

2, the longest storage 15-20 days is no problem, but it should be eaten as soon as possible. When eating, thaw it first, then rinse it with warm water, and then stir-fry or mix it.