Stinky tofu itself is ordinary tofu marinated with salt and then smeared with special stinky water juice to sell (some are soaked in stinky water juice). Fresh tofu is cut into pieces, neatly packed in plastic boxes, patted with salt, and smeared with ugly stinky water juice when it is sold in the market. And this stinky water juice is the rumored dung water, but it is not at all. I vaguely remember that at that time, there were several vats in our yard, which fermented smelly juice all the year round. My father often poured tofu flowers and tofu scraps at the bottom of the soybean milk bucket into the vat and covered it with a lid for fermentation. It was even worse to ferment soy products alone. The key was to add a secret recipe to it. This secret recipe was made by grinding several Chinese herbal medicines and frying them with pepper, sesame, peanuts and dried tangerine peel.