1. First, prepare materials: flour 6g, light soy sauce, oyster sauce, sesame oil, barbecued pork 5g, sugar, onion and ginger.

2. Add sugar, oil, yeast, water and dough to the flour and ferment for 2 hours.

3, pork lean meat, add salt, onion ginger, sugar, soy sauce, oil consumption, marinate for 1 hour, and bake in the oven at 2℃ for 4 minutes.

4. Make barbecued pork.

5. Dice the barbecued pork, put oil in the pot, add minced onion and ginger, stir-fry tomato sauce and meat, add light soy sauce, oil consumption, sugar, salt, a little water and cornflour to make the barbecued pork stuffing.

6. Pick up a small dose of flour and roll out the stuffing of leather bag.

7. Wrap it into buns with the smooth side up, steam it in a cage for 15 minutes, then take it out and put it on a plate.