2. Pour ordinary flour into a container, add yeast and white sugar (white sugar promotes yeast fermentation), stir evenly, pour warm water, stir with chopsticks while pouring, stir into a big cotton wadding shape, knead into a dough, knead into a smooth and slightly hard dough, cover it with plastic wrap, and put it in a warm place to double its size.
3. After selecting kidney beans, wash them with clear water, add water to the pot and cook for two minutes. After cutting kidney beans, take them out and soak them in cold water for a while.
4. Peel and wash shallots, cut into pieces, cut into pieces of ginger, rinse pork with clear water, control moisture, cut into smaller minced meat with a knife, put the chopped minced meat into a big bowl, add an egg, stir well, add chopped green onion and Jiang Mo, stir well, then pour in salt, soy sauce, thirteen spices and chicken essence, and stir in one direction for a while with chopsticks.
5. Sprinkle a layer of dry flour on the panel and put the dough on the panel. There are many pores in the dough. Knead by hand, exhaust air, and knead for a while to make the dough stronger. After kneading, arrange into long strips, cut into pieces of the same size with a knife, arrange each piece into a circle from outside to inside, flatten it by hand, and roll it into a round cake with a rolling pin.
6. Take a rolled dough and spoon a spoonful of meat stuffing in the middle of the dough. Gently press the meat stuffing with your right thumb. The left hand starts to rub from one side of the steamed bread skin. The left hand and the right hand should cooperate with each other and turn the steamed bread clockwise while pinching the wrinkled skin. Finally, close your mouth and knead it gently, and the whole stuffed bun will be wrapped perfectly.
7. After the steamed buns are wrapped, put warm water of about 40 degrees into the steamer, put the steamed buns on the steaming curtain, cover them, and steam for the second time 10 minute. After steaming, the volume of steamed buns is obviously increased (this step must not be saved). Steam for 25 minutes, then stew for 5 minutes, and the steaming big steamed buns will be steamed.