2. Before steaming and freezing jiaozi, it needs to be thawed at room temperature, and then steamed in the pot when the water boils and bubbles. Don't put water into the pot to avoid uneven heating. The steaming time is counted from the time when the water boils.
3. The time for steaming dumplings should consider not only the thickness of the skin, but also the stuffing. Generally, the steaming time of vegetarian stuffing in jiaozi is shorter than that of meat stuffing in jiaozi, and the quick-frozen meat stuffing in jiaozi is more difficult to cook.