1. When boiling jiaozi, add some salt to the water first, which can effectively reduce the phenomenon that the dumpling skin is boiled, and make the dumpling skin more tough and chewy.

2. If boiling water is always used when cooking jiaozi, the dumpling skins will stick together easily, which will lead to the phenomenon of broken skin. Therefore, in the process of boiling jiaozi, cold water should be added several times, so that jiaozi won't stick together, thus preventing jiaozi from breaking skin.

3. When cooking jiaozi, putting two pieces of green onions in the water can effectively reduce the situation that jiaozi is boiled, and adding green onions can also make jiaozi more fragrant.