2. Don't cover the jiaozi when you start cooking, so that the dumpling skin above the water won't break.
3. When cooking jiaozi, stir constantly until the skin is cooked, then cover the lid and continue to cook until the stuffing is cooked.
4. Put jiaozi in cold water and boil it over medium heat. But in the process of cooking jiaozi, jiaozi should be stirred with a spoon to prevent jiaozi from sticking to the pot, and it should be stirred clockwise. After the water boils 1 min, add 1 small bowl of cold water, continue to boil, and add cold water twice, and jiaozi can cook.