First of all, we cut the bought tofu (with less water content) into small pieces, put it in a basket evenly, and then put it in a ventilated place for a day to dry the water.

2.

We cover the dried tofu with a lid or something and put it in an unventilated and dark place for a week.

3.

A week later, when we open the lid, we will find a layer of white or yellow mold on the tofu. At this time, we can take out a clean bamboo fence, clean it and dry it for use. A piece of gauze is suitable to cover the bamboo fence, then cut the tofu into small pieces with a square of 2.5 cm, spread it out in the bamboo fence, cover it with gauze, and put it in a place with little indoor activity or on the balcony. You can smell it in four or five days.