More than three days of valley breaking is designated as valley-breaking, less than three days as dieting. Break the valley 3-7 days for short-term valley, 8-14 days for medium-term valley, 15 days or more for long-term valley.

First, the choice of season

The best time to choose the best time to start the valley in the spring and fall, because this time the temperature is moderate. Winter is relatively cold, after fasting energy is reduced, the body temperature drops, the ability to protect against the cold decreases. Summer is relatively hot, in the case of energy reduction, easy to heat stroke. But this is not absolute, good health, people with experience in fasting, any time of the year can be fasted.

Secondly, the time of a single paiwan

The time of a full paiwan, or 7 days, or 14 days, or 21 days, is usually a multiple of 7 days. Less than 3 days, can not be called a grain, can only be called a diet. More than 21 days of full openness, the difficulty is more difficult, mostly people with cultivation skills can do.

Third, the choice of the cycle of time

On the choice of the cycle of time, if it is for the purpose of health, the long-term cycle of the Valley, two to four times a year, it is better, too frequent may not be appropriate. If it is for the purpose of curing the disease, the number of times to avoid the valley can be increased appropriately.