Ingredients: 1 kilogram of dried soybeans; 4 taels of white flour; 1 ripe watermelon (6 kilograms, use 4 kilograms of watermelon juice); 4 taels of salt; a little pepper and anise.

Utensils: 2 clean glass bottles (each can hold 2 pounds of water); 1 piece of clean kraft paper; 1 small quilt; 2 small pieces of gauze; 2 leather bands.

Preparation method:

1. First, pick out the broken pieces and bad soybeans. Wash the soybeans and soak them in cold water. After boiling the pot, cook for 5 minutes. Be sure to remove the beans. Cooked.

2. Quickly use a small basket with a mesh to drain the beans. Place the cooked beans in a floured dustpan while they are still hot. Roll the beans so that each bean is covered with flour.

3. Pour the rolled beans onto clean kraft paper while they are hot, fold the four sides of the kraft paper, cover it with a small quilt and start covering the beans.

4. Generally, the weather is hot and the room temperature is 25 degrees. Cover the beans for 3 to 5 days. Check them after two days. Generally, they can be cooled if white hair appears. Green hair will appear on cloudy days or if you cover it for a long time. Never black hair.

5. If you are not going to add sauce immediately after covering the beans, be sure to dry the covered beans again and wait for the sauce to be added.

6. Be sure to prepare a ripe watermelon before adding the sauce. Only dig out the core of the watermelon and remove the seeds to make watermelon juice. It is best to buy seedless melon to add the sauce.

7. Boil salt, pepper and anise with a small amount of water and let cool.

8. When adding the sauce, put the covered beans, watermelon juice, salt, pepper and anise water into a clean glass bottle, and stir evenly with clean chopsticks.

9. Cover the glass bottle with clean gauze, use a cowhide band to stretch the gauze, and place it in a sunny place to dry.

10. Open the gauze and stir it gently with clean chopsticks every day, then cover it with gauze and continue to dry. If you don’t have outdoor conditions, just do it in a sunny place on your balcony.