1, "Pigu" originated from "not eating five grains" in Taoist health preservation, which was a common way of health preservation in ancient times. It originated in the pre-Qin period and was popular in the Tang Dynasty. Also known as "Valley Valley", "Valley Valley Valley", "Valley Valley", "Valley Valley" and "Hugh Valley". The earliest record of Bigu originated from Zhuangzi Xiaoyao Tour: "The mountain shot by the ancients is inhabited by immortals. If the skin is ice and snow, it is like a virgin, not eating grains, sucking wind and drinking dew, traveling around the world by flying dragons ... "As a way to prolong life, it is also recorded in many ancient books.

2. The traditional ways of avoiding valley are mainly divided into taking medicine and taking medicine. Persuaded to break the grain mainly through hunger strike and breath adjustment (breathing), but its effectiveness lacks scientific basis at present; Taking medicine to avoid cereal is to adjust the body function by taking other complementary foods (nuts, Chinese herbal medicines, etc.). ) instead of eating the staple food (grain).