Method of breaking grain: breaking grain for more than three days is defined as breaking grain, and less than three days is regarded as dieting. During the period of broken grain, low-level people generally don't eat any food, only add water or eat a small amount of fruit, while high-level people don't eat any food or drink water. 3-7 days of broken grain is short-term broken grain, 8- 14 days is medium-term broken grain, and more than 15 days is long-term broken grain. Bigu is divided into three grades: low, medium and high. Not only do you not need to eat fireworks, but you also need to learn some qigong to replenish energy during the valley, so as to achieve a state of not being hungry. -Luo Chen Dojo, Laojunge Health Management