Once upon a time, when the barber walked up and down the street, he used a kind of "calling his head". It is two iron bars, one end of which is sintered into a handle, and the other end is slightly opened, with a total length of one foot and two inches. Holding it in the left hand, the right hand picked it up from the gap between two iron bars with a five-inch nail and made a loud noise. This is the cry of shaving your head (that is, the city sound). It was not the industry that shaved their heads in the early Qing dynasty, but the officials who carried out the shaving order. The steel knife cloth on the flagpole turned out to be an imperial edict, which read: "Leave your head hairless, leave your hair headless!" " With the changes of the times, this imperial edict was replaced by steel knife cloth. The shaving industry also has a set of jargon. For example, people who shave their heads are called "take three" and take the whole tone. This jargon is not only in Shenyang, but also in the north and south of the Yangtze River. In addition, the male position is called "looking at the back", the female position is called "mustache" and the haircut is called "hat tassel".