1. First, prepare the sauce: Pour an appropriate amount of light soy sauce, a little vinegar, 1 tsp of sugar, and a little sesame oil into a bowl, stir well and set aside.

2. Chop the onion, garlic and chili pepper and set aside.

3. Cut the tofu into pieces, drain the water, heat up an appropriate amount of oil in a wok, put the tofu into the pan and fry until both sides are golden brown, and set aside.

4. Leave a little oil in the pot, pour the prepared sauce and stir-fry evenly.

5. Pour in the cooking wine, then chop the onions and garlic. Add Chaotian pepper and stir-fry until fragrant, add a little dark soy sauce, salt and stir-fry evenly.

6. Finally, add the fried tofu and stir-fry evenly.

7. Cook until the soup is thick and ready to serve.