Bigu, also called Guqi, is one of the five techniques of Taoist medicine in China, namely "Mountain, medicine, life, physiology and divination". It began in the pre-Qin period and is an important part of Taoist health preservation, but it is difficult for ordinary people to operate.

The valley can be divided into three levels:

1, serving the gods: that is, not eating or drinking, the representative figure is Zhuangzi, which ordinary people can't do;

2, convinced to avoid the valley: don't eat, representative Zhang Sanfeng. At present, this level of broken grain is mostly used in the market, which is divided into 7 days, 14 days, 2 1 day and 28 days, which is dangerous and needs professional guidance.

3. Eating to avoid the valley, also known as fast food, has many representatives, such as maoshan taoist and Ge Hong. At present, improvement and optimization is the safest way to avoid grain in the market.

As for the family you mentioned, you'd better know more about it.