(1) Tofu is made by soaking soybeans in water, washing them with clean water, adding 20-25 kilograms of clean water, grinding them into a thin paste with a stone mill, adding warm water with the amount of thin paste, mixing them evenly, putting them into a cloth bag, extruding the slurry, mixing them with boiled water in the bean dregs, and then squeezing. When the bean dregs do not touch hands continuously and the soybean milk has been squeezed out, skim off the foam and put the slurry into the pot. If the dripping water is not mixed with the pulp, it will turn into tofu brain in about 20 minutes. Scoop the bean curd into a wooden box, cover it with wooden boards, press on heavy stones, and press off the water, and it becomes bean curd. (2) Stir-fry the stinky tofu. Put the soapy alum into a bucket, pour boiling water and stir with a stick, soak it in the tofu for about 2 hours, take out the tofu and let it cool. Then soak the tofu in salt water for about 3-5 hours in spring and autumn, 2 hours in summer and 6- 10 hour in winter. Take it out after soaking, wash it with cold boiling water, drain the water, and then pour all the tea oil into the pot to burn red. Add tofu and fry for about 5 minutes. Once brown, take it out and put it on a plate, and drill it in the middle of tofu with chopsticks. (3) The preparation method of brine is based on 2.5kg douchi, which needs to be boiled with 15kg clear water, filtered, soaked with 1500g alkali in juice for about half a month, stirred 1 time every day, and fermented to obtain brine.