Cold and dampness accumulate in the body, yin and yang are unbalanced, bile is reduced, food stays for a long time, digestion is slow, and some bile flows into the stomach reversely, which reacts with gastric acid to destroy the gastric mucosal barrier, resulting in bad stomach. The root is bile. Sometimes when you are free, you can pick some bitter vegetables from the field near the field, take a proper amount, boil them in water and add some brown sugar. Produced in Guannan, it should be picked in early spring.