1. Quick-frozen dumplings usually need to be boiled in cold water for 15-20 minutes.

2. If quick-frozen dumplings are cooked for too long, the outer skin of the dumplings cannot withstand the high temperature and will crack and become soft, and the filling inside will also be lost, reducing the taste.

3. If boiling water is used to quickly freeze dumplings, the hot water temperature will be higher, which will affect the outer skin of the dumplings and make them prone to cracking. Moreover, the hot water is not heated evenly, so the inside of the dumplings will be harder to cook than the outside.

4. When cooking dumplings, stir carefully to avoid sticking.