It usually appears in urban white-collar or middle-class life circles.

Bigu means to find a secluded valley.

Live in it for a while

Don't eat big fish and meat during this period.

It's like practice.

No eating.

Not particularly strict. You can eat some vegetarian dishes and staple foods.

Do not eat oil, salt and meat.

Now, some people like to lose weight by practicing meditation, such as crossing the valley.