Modern people are not suitable for crossing the valley. Due to the lack of self-cultivation culture in modern society, people in society, including many health experts, know little or even nothing about this kind of thing. In fact, crossing the valley has nothing to do with ordinary people, because crossing the valley is a practice method of ancient Taoist priests and a state that people appear in the process of monasticism. As the saying goes, people in society are neither Taoist nor ignorant of Taoist practice methods. Isn't that irresponsible to yourself? And they hardly eat when they cross the valley. Ordinary people who have never practiced Buddhism can't cross the valley at all, but will do harm to their health. Therefore, I would like to advise some friends who like to keep in good health not to think about the valley before they have undergone professional Taoist cultivation and the cultivation realm has not met the requirements of Taoism.
What is popular in modern society now for the ancient real valley? Pigou? It can be said that there is too much water mixed, so there is basically no credible method to break the grain in society now. Some people sell broken grains just to fool others into their pockets. Moreover, Bigu is a state of cultivation in ancient Taoist monasticism. Don't say that ordinary people in modern society can't meet this requirement, even Taoist practitioners in modern mountains can't meet it.
There were indeed many people and methods to break the valley in ancient China, but after thousands of years of circulation, these methods have been basically lost for some historical reasons, so the methods to break the valley in society are no longer credible, and ordinary people must be cautious about this kind of thing.