Chestnut in autumn is sweet and delicious, which is the most delicious among many fruits, because it is not only delicious, but also nutritious, and it is an excellent autumn health tonic. In China, Liaoning, Beijing, Hebei, Shandong, Hunan, Fujian, Henan and other places. The preservation method is not to put seasoning such as salt at the bottom of the soup. After the soup is cooked, scoop out what you want to drink that day with a clean spoon. If you can't finish it, put it in the refrigerator with a clay pot. Because the leftover soup is stored in aluminum pot and stainless steel pot for a long time, it is prone to chemical reaction, so it should be kept in glass or ceramic utensils.