Spring and Autumn and Winter Festival. It can be processed in spring, autumn and winter all year round, except that the temperature is too high in summer, April is the best, and heat preservation should be done in winter. Tofu milk, a traditional folk food of Han nationality that has been circulated in China for thousands of years, has a good taste, high nutrition and a foul smell. Its special flavor is deeply loved by people in China and Southeast Asia, and it is an enduring delicacy. Sufu is usually divided into three categories: green square, red square and white square. Among them, stinky tofu belongs to "Qingfang". "Big chunks", "red peppers" and "roses" belong to "red squares". "Sweet and spicy", "osmanthus" and "spiced" belong to "white side".