1. Frozen jiaozi should be cooked in cold water. If you put hot water into the pot, the outer dumpling skin will become hot as soon as it is put into the pot. In addition, the frozen jiaozi is cooked for a long time, so it is easy to see that the stuffing inside is not cooked and the dumpling skin outside is broken.

2. Frozen jiaozi, the fire should not be too big, otherwise the skin is cooked and the stuffing is not cooked. In addition, add a little salt to the water to avoid sticking to the skin.

3. After the quick-frozen jiaozi is put into the pot, submerge the pot with a spatula to avoid sticking to the pot.

4. Add cold water three times after the water is boiled, and add about half a bowl of cold water after each boiling. Most importantly, if jiaozi swells up, it will be ripe.

5. Boil fresh jiaozi water in the pot, and then go to jiaozi. When the water boils, add cold water and wait for the water to boil. Cook on low heat until jiaozi expands.