1. Add flour and yeast to the bowl, knead with warm water to make dough, and make it twice as big; 2. Add minced meat, minced onion and ginger, salt, chicken essence, white pepper, soy sauce, sesame oil, corn oil and oyster sauce into the bowl, and stir and marinate for 10 minute; 3. Boil water in the pot, add salt and oil, blanch the beans, remove them and cool them, chop them up and put them into the meat and mix well; 4. Cut the dough into flour, roll it into skin, wrap it in stuffing, steam it in a pot for 18 minutes, and then turn off the heat for 3 minutes.