About half a year. Prepare a pan and add black beans. Stir fry with medium heat for about 5 minutes, when the black bean skin burst open, change to low heat, stir fry for another 5 minutes, cool the fried black beans for 15 minutes, put them into a clean container with a lid. Then add brewing persimmon vinegar, soak for about two hours, persimmon vinegar is absorbed by the black beans can be eaten, placed in the refrigerator or a cool dry place can be stored for about six months.

About six months. Prepare a pan and add the black beans. Stir-fry over medium heat for about 5 minutes, then when the black bean skins burst open, change to low heat and stir-fry for another 5 minutes. Cool the stir-fried black beans for 15 minutes, then place them in a clean container with a lid. Then add brewing persimmon vinegar, soak for about two hours, persimmon vinegar is absorbed by the black beans can be eaten, placed in the refrigerator or a cool dry place can be stored for about six months.