According to legend, when Zhang Zhongjing was the magistrate of Changsha, he often treated the people.
One year, when the local plague was prevalent, he made a cauldron at the entrance of Yamen, giving up medicine to save people, which was deeply loved by Changsha people.
After Zhang Zhongjing retired from Changsha, he just caught up with the winter solstice and walked to the shore of the Baihe River in his hometown. He saw that many poor people were hungry and cold, and their ears were frozen. It turned out that typhoid fever was prevalent at that time and many people died.
He was very upset and determined to treat them. When Zhang Zhongjing came home, many people sought medical treatment. He is as busy as a bee, but he always remembers those poor people with frozen ears.
He followed Changsha's example and told his disciples to build a medical shed and cauldron in an open space in Dongguan, Nanyang, and open it on the day of winter solstice to send medicine to the poor to treat their injuries.
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How to be jiaozi:
Boil in cold water and quickly freeze jiaozi. Quick-frozen jiaozi is easy to break the skin when cooked in boiling water, and the meat stuffing is not easy to cook. Boil jiaozi in cold water, and then quickly freeze it. With the increase of water temperature, the dough and meat stuffing in jiaozi are heated more evenly and the skin tastes stronger.
Fresh jiaozi cooked in boiling water. Jiaozi, which is wrapped at home, must wait for the water to boil before cooking. When cooking jiaozi, put jiaozi into the pot while boiling water, and then gently push it in one direction with a spatula to prevent jiaozi from sticking to each other or sticking to the bottom of the pot.
The general saying is that "the pot cover cooks the stuffing, but not the pot cover cooks the skin". If jiaozi just covers the pot and cooks, the high temperature of steam will easily break the dumpling skin.
Jiaozi just after the pot, should first boil. After the dumpling skin is cooked, cover it in time to cook the stuffing better. When jiaozi is about to surface and boil, uncover the cooked skin again.
Baidu Encyclopedia-jiaozi