Frozen jiaozi can be boiled in boiling water or cold water. After boiling in boiling water, put it into jiaozi to avoid sticking to the pot. After boiling, add a small amount of cold water and repeat for three times. Cold water needs to be heated with water when it is put into the pot. After boiling, turn to low heat and cook until it floats. Take it out in time after cooking to avoid overcooking.