Simply put, it is to reduce the intake of staple food, so that you don't eat staple food at all, and continue your life by adjusting your breathing; The belief of crossing the valley comes from an animal: the tortoise.

In fact, after fasting for 24 hours, glycogen in the liver is consumed, and red blood cells and brain tissues generally only consume glucose, so the human body will convert other energy substances in the body into sugar for consumption.

After fasting for 36 hours, the protein of muscle decomposes and releases amino acids, and the liver ingests alanine to make sugar under the action of hormones;

After fasting for 48 hours, the body began to consume fat to produce energy.

Taking medicine to ward off the grain means not eating whole grains, but eating nuts and Chinese herbal medicines, thus regulating body functions and achieving the purpose of prolonging life.

In ancient times, some schools ate nuts and drank wine, while others ate Chinese herbal medicines. According to historical records, in the Song Dynasty, some people used Chinese herbal medicines to cook rice, while others were persuaded to eat rice. They also drank many glasses of wine every day. It can be seen that breaking the valley does not mean cutting off all diets, but just "drinking the northwest wind" can make you full ~ In addition, it is a three-point poison, and taking medicine for a long time will definitely cause a certain burden on the body, so taking medicine to break the valley is still not suitable for us ordinary people.

In short, it is a way to get through the negative energy system of human body-midvein system, and with the Taoist gas collection method, the energy needed by human body can be obtained by taking gas, thus entering the broken valley state.

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