Can chestnut be directly packaged when fried?

There are many ways to process chestnuts, including sugar chestnuts, cold chestnuts, and of course, chestnuts with open mouths and fried chestnuts with sugar water that we often eat. Chestnuts in sugar water are usually cooked and sterilized, and then directly packed in iron cans or glass bottles and treated at high temperature. Put cold water chestnuts in an iron can, and then add ice water. The sugar-fried chestnuts that we often eat, if we don't eat them right away, we'd better pack them in paper bags for easy carrying. There is also a kind of joke {sugar fried chestnuts}, which needs to be shelled and colored while it is hot, and then frozen after it is completely cooled. Generally, it is packed in plastic bags. Chestnuts in sugar water and chestnuts in cold water should be shelled and peeled, cut into certain shapes and then processed. Except for the sugar-fried chestnuts we eat, the chestnuts processed by the factory are generally exported to South Korea and Japan.