Cover the lid and cook the skin first, then open the lid and cook the stuffing. When the lid is opened, the surface of jiaozi is in direct contact with the outside air, so the heat dissipation is fast and the temperature is lower than that in the pot. However, because the dumpling stuffing is wrapped in the skin, the heat is not easy to escape and the temperature can be kept high.

2. Put jiaozi in the pot and cover it. After the water boils for a while, open the lid and let the water evaporate to take away the heat until jiaozi is completely cooked. If you keep cooking with the lid covered, the water in the pot will not evaporate, and the water temperature will be high, which will easily cause the dumpling skin to crack. This is the experience gained by predecessors after groping.

1. jiaozi originated from the ancient trough. Jiaozi, formerly known as Joule, is said to have been first invented by Zhang Zhongjing, a doctor in China, with a history of 1800 years. It is a traditional specialty food deeply loved by the people of China, also known as jiaozi. It is the staple food and local snacks for people in northern China, and it is also a New Year's food.

2. Dumpling skin can also use hot soup noodles, crispy noodles, egg steps or rice noodles; The stuffing can be vegetarian, sweet and salty; Cooking methods can also be steaming, roasting, frying, frying, etc. There are three kinds of meat stuffing, shrimp, crab roe, sea cucumber, fish, chicken, pork, beef and mutton. And vegetarian stuffing is divided into assorted vegetarian stuffing and ordinary vegetarian stuffing. Jiaozi is characterized by its thin skin and tender stuffing, delicious taste and unique shape.

3. There are various nutrients in jiaozi's raw materials, and the cooking method ensures less loss of nutrients, which conforms to the connotation of China's color, fragrance and food culture. Jiaozi is a folk food with a long history and is deeply loved by people. There is a folk saying "delicious but not as good as jiaozi". During the Spring Festival, jiaozi has become an indispensable delicacy.