1 It takes about half an hour to cook the quick-frozen raw zongzi bought in the supermarket in a pressure cooker, and it takes more than an hour to cook it in an ordinary pot. The cooked zongzi can be steamed directly in a steamer for about 10 minute.

2. It is best to thaw the quick-frozen dumplings before cooking. Direct cooking may cause the dumplings to burst. It is best to cook the quick-frozen dumplings with cold water.