The purpose is to keep the temperature in the pot high under the condition that the fire is difficult to adjust, such as firewood and coal fire, without causing overflow, and at the same time, it can supplement the water lost by evaporation.

The purpose of keeping the temperature in the pot high is to cook the stuffing, and the heat transfer goes from the outside to the inside. The meat stuffing is generally cooked later than the dumpling skin, so it needs to be cooked for a few minutes after the dumpling skin is cooked.

In fact, under the condition of using controllable fire sources, such as natural gas, liquefied gas and electric furnace, as long as there is enough water in the pot and no water is added, the fire source can be turned down to maintain a slight boiling for several minutes, which can also achieve the goal of cooking jiaozi and save energy.

Extended data:

Conventional method for cook jiaozi:

1, first boil the water,

2, pour jiaozi into the water, be careful not to be too much, easy to stick.

3, stir the hot water, let jiaozi move don't stick to the bottom of the pot.

4, cover the pot, such as jiaozi floating can eat.

Note: If jiaozi doesn't float after boiling, add cold water several times until jiaozi floats.

References:

Cook jiaozi-Baidu Encyclopedia