Jiaozi should be boiled in warm water. When the water began to bubble, the water temperature reached 80 degrees. Enter the frozen jiaozi, gently push the water with the back of the spoon to drive jiaozi to rotate together to prevent adhesion. First, boil the jiaozi until it floats to the surface, then boil some cold water in the pot, and then turn to medium heat and cook slowly. When the dumpling skin does not turn white, it is cooked.