Why is the brush also called "Mao Ying", "Guan Chengzi" and "Zhong Shujun"

Brush has many aliases, such as "Mao Ying", "Guan" and "Zhongshujun". In fact, these three titles are all from Han Yu's Biography of Mao Ying. Han Yu wrote Biography of Mao Ying to express his sorrow that he was empty and talented and was not reused. Because it is written in the form of fable, it is quite interesting. The ancient brush was originally made of rabbit hair and had a sharp edge. "Welcome" means the front, so the writing brush is also called. Han Yu said that Mao Ying was from Zhongshan by personification. During Qin Shihuang's reign, General Meng Tian cut Chu and stationed in Zhongshan, capturing a large number of rabbits. "Pulled out the golden crown, took Ying home, put him in Zhangtai Palace, gathered a family and tied him up." This is the making process of the brush, which symbolizes the legend of Meng Tian's pen-making, so the name of the brush "Mao Ying" has been widely circulated. As far as the calligraphy museum is concerned, it is a calligraphy learning base. Brush is also called "Guanchengzi". ("Biography of Mao Ying") said: "Qin Shihuang made the field give soup, sealed the city, and posthumous title closed the city." The "Guancheng" here is a pun. In the early years of the Western Zhou Dynasty, Guan Shu was named Guancheng, which was in line with the characteristics of Biography of Mao Ying. The pen holder is made of bamboo tube, and the hair is plunged into the bamboo tube, which personalizes the tube city and makes the brush become the "tube city". The writing brush is also called "Zhongshu Army". ("Biography of Mao Ying") It goes: "(Qin Shihuang) hates worshipping the orders of Chinese books, and ... as soon as he tastes bald, he is called a gentleman in Chinese books." When his pen is bald, "he laughed and said,' The gentleman in the middle school is old and bald, so he doesn't use it for me. I taste that you are in the book, but you are not in the book today. Evil? "Chinese book" is suitable for writing. If the brush is used for a long time, Feng Ying will fall off, making it unsuitable for writing. Han Yu wrote this article with emotion, but he just used Mao Ying as a metaphor. The writing brush, also known as "Mao Ying", "Guan" and "Zhongshujun", is widely circulated, which is probably unexpected by Han Yu.