Breaking the valley is one of the methods of Taoist health training, also known as breaking the valley, breaking the valley, breaking the valley, stopping the valley, breaking the valley, that is, not eating whole grains. The full name of Bigu is "Faithfulness and Bigu", also known as "Bigu Longevity" and "Bigu Health". The immortal named "Don't eat grains, suck wind and drink dew" in Zhuangzi and Xiaoyao Tour has a direct influence on the emergence of Taoist valley-piercing. Bigu method prevailed in Jin and Tang Dynasties. Taoism believes that monks eating whole grains will produce a foul smell in their intestines, which will hinder the success of cultivating immortals. It is said in Taiqing and Huang Zhen Jing that there is a parasite called "Three Corpses" in human body. If people practice in the valley, they can eliminate this kind of "Three Corpses". Ge's words are quoted in the Five-character Preface of Xuanlingbao in Taishang Cave. Three worms are removed first, and then the corpse is released. "You can bring rice or stop eating." Ge Hong of the Eastern Jin Dynasty said: "If you want to live forever, your intestines should be clear." If you want to live forever, there is nothing in your intestines. Taoism believes that excessive food intake will increase the load of digestion and transformation functions, so that the stomach, heart, lungs, liver and gallbladder and other organs can not get a good rest, thus affecting people's normal life. It is beneficial to clean the stomach and cut off the deposition of filthy things. The life-saving technique of avoiding grain is based on qi and medicine, and achieves the purpose of avoiding grain and preserving health through qi and food. Taoism believes that you can prolong your life by keeping fit through the valley. There are three volumes in Bao Puzi's Inner Chapter Remote Reading, and seventy-four prescriptions are recorded in Zhang Junfang's Yun Qi Zheng in the Northern Song Dynasty, which also records the prescriptions to persuade people to avoid the valley.

Kim? Ge Hong: Chapter of Bao Puzi, Miscellaneous Answers and Taoist Collection.