The materials that need to be prepared in advance are: 5 kg of soybeans, appropriate amount of ginger, appropriate amount of garlic, appropriate amount of pepper noodles, appropriate amount of pepper powder and appropriate amount of salt.

1. Stir-fry soybeans on low heat. Add some dried tangerine peel and camphor leaves and stir-fry until fragrant.

2. Wash the fried beans with clear water and filter the water with a leaking tool.

3. Boil the washed beans in water. It would be better if the water had just passed. You can add water while cooking.

4. Boiled beans will leak.

5, take out the fermented beans, add the right amount of salt, pepper noodles, ginger, garlic, pepper and the like, stir well and dry.

6. In a few days, it's settled.