Black beans in vinegar can not be put in the refrigerator.
Black beans in vinegar:
I. Material
500g of black beans, 250g of vinegar
II. Practice
Wash the black beans and put them into a dry pan and fry them.
Stir fry until the beans split open.
Find a container that can be sealed and put the fried beans into the container.
Pour in the vinegar, make sure the amount of vinegar is not over the black beans, as the vinegar will swell after soaking for a while.
Seal the jar.
Open the jar after a week, the black beans are soaked and swollen, this time you can eat.