First of all, we need to understand the two concepts of "stomach" and "ping" in the title. The so-called "stomach" refers to "taking the pulse with the stomach": Chinese medicine believes that healthy people's vital qi comes from the stomach, and because the stomach is the sea of water and grain, it is the biochemical source of human qi and blood, so "stomach qi" is the normal qi of healthy people; Of course, it is manifested in the pulse condition, and the pulse condition with "stomach qi" is the healthy pulse condition of normal people. The so-called "ping" refers to a normal disease-free person or a disease-free state.

Then let's talk about this so-called "weak stomach in summer." The relevant scripture says: "in the long summer, the stomach is weak and flat, and the weak stomach is less and the spleen is sick, and the generation without stomach will die;" Weakness has Shi Yuedong's disease, and weakness is more serious than today's disease. The reason lies in the spleen, which stores the qi of muscles. " The general idea of this passage is that in the long summer season, the pulse with stomach qi should be a slightly weak pulse, which is a disease-free flat pulse in the long summer season. In the long summer, if you see a weak pulse and insufficient stomach gas in clinic, it suggests that the spleen is sick. If you see a pulse without stomach qi in clinic, it is a dead pulse; Clinically, if the pulse is weak and accompanied by the image of sinking stones, it is a long pulse in summer, suggesting that fire, soil and gas are weak and water is against the threat, so it can predict the patient's illness in winter; If the pulse shows that the fire is weak, the patient will get sick now. Physiologically, the spleen stores the qi of muscle because the spleen is strong in summer, and the qi in summer is nourished by the spleen, which controls the muscle.