Prepare ingredients: 200 grams of black beans and 80 grams of mature vinegar.

Second step

Wash black beans.

Third step

Then stir-fry the black beans in a pot, stir-fry for 5 minutes on medium heat, and then dry the black beans.

Fourth step

Then turn to low heat and stir-fry until the bean skin cracks, and you can get out of the pot when you hear the noise.

Step five

Then cool the fried black beans.

Step 6

Pour in the old vinegar.

Step 7

Sealed refrigeration 1-2 days.

Step 8

It's done.