1, will be appropriate amount of raw black beans after washing and drying water, the raw black beans soaked in 8 degrees of sour old vinegar, placed in a cool place sealed soak about two weeks or so, can be eaten, this method of time is relatively short and the effect is also relatively good, recommended that we use.

2, the right amount of raw black beans after washing and drying water, soaked in 8 degrees of sour old vinegar, sealed in a cool place soaked half a year to a year or so. This method in eating up the taste is the best, neither raw bean flavor, but also easy to digest, if greedy will not cause diarrhea, the disadvantage is that the time is relatively long.