There are two main reasons for this. First, it is the beginning of filial piety. Second, the ancient criminal law of shaving the hair was called Kun punishment, which was one of the five punishments in ancient China. It was a kind of shame punishment, which was mainly popular from Xia and Shang Dynasties to the Eastern Han Dynasty. Kun refers to shaving off the hair and beard of the prisoner. Kun punishment is a punishment for the offender in the form of personal insult. The ancients thought that the parents who suffered from their body and skin would not dare to destroy them. Therefore, shaving is a kind of humiliation to him.
During the Wei, Jin, southern and Northern Dynasties, Buddhism was popular. Because Buddhists shaved their heads and did not marry, it was a great act of filial piety, so people at that time called them Kun people. Kun punishment originated from the Zhou Dynasty. Among the royal families who committed palace punishment, Kun took the place of the palace, that is, cutting long hair for short hair. In the Qin Dynasty, it lost this property and became a punishment of shaving the hair of the victim. It was a normal state for men in ancient China to grow their hair and hair. This kind of punishment was to shave off the criminal's hair and beard, so that the criminal was in an obviously abnormal state and felt pain. There is a well-known story that may be familiar to friends. One time during the March, Cao Cao gave an order not to trample on the farmland. He wanted to protect the farmers. If anyone's horse stepped on the wheat field, it was a crime to kill his head. So Cao Cao's cavalry all dismounted and walked, holding the horse in one hand, using weapons in the other hand, and protecting the wheat with a dagger or something Walk with wings.
Cao Cao himself did not dismount (it was said that a pheasant flew out of the ground). As a result, the horse was startled and jumped into the wheat field. Cao Cao's horse trampled on the wheat field. Cao Cao immediately dismounted and called the military judge to say, what should be the crime? The military judge said, kill the head. Cao Cao said, please execute. Alas, how can it be? Anyway, there is such a tradition in ancient times that punishment does not go up to the senior officials, etiquette does not go down to the common people, and the law is not applied to those who respect it, how can the commander-in-chief kill his head. Cao Cao said that there was no way to do it. He took out his sword and cut a piece of his hair and threw it on the ground to show that he had been punished. Therefore, in fact, there were more internal factors in ancient people's long hair, not that short hair was not good-looking, or long hair was very good-looking. I guess if the Qing Dynasty Manchu did not enter the pass, our long hair tradition would inevitably be left behind. Although the modern social lifestyle makes long hair sometimes inconvenient, a large number of people will follow the tradition and keep long hair Men with long hair are not necessarily considered pseudo art, sissy, etc.