1. The main ingredients are ready (black beans are soaked in advance).

2. Pour black beans and ginger into half a pot of cold water (about 5 bowls of water); Cover with big fire and heat with small fire.

3. Prepare a pot, put it in a half pot, cook for 7 minutes, and pour in the pig's tail.

4. Boil a lot of foam.

5. Take out the pan and wash the floating foam on the meat with running water.

6. Pour the pig's tail into the black bean pot and simmer for 1 hour until the rotten beans are cooked.

7. The soup is obviously less; Add a little salt and pepper to the pot.

8. It's delicious. Eat it.