2. Put cold water in the pot, add a proper amount of salt in the water, and put the water into jiaozi. When the pot boils again and turns to medium heat, pour cold water for three times. It usually takes 10- 15 minutes from the pot to the cooking. Frozen jiaozi is a kind of food that can be eaten at any time by quick freezing the wrapped jiaozi. Jiaozi is a traditional special food loved by the Han people in China, and it is a must-eat food for the Spring Festival every year.