How does Biography of Mao Ying describe Meng Tian's pen-making?

The biography of Mao Ying, written by Han Yu, a writer in the Tang Dynasty, uses anthropomorphic techniques to establish a biography of the brush, and makes textual research on the ancestors of the brush, which makes the whole story interesting.

According to the description in Biography of Mao Ying, Mao Ying was born in Zhongshan. His ancestor was a rabbit, who helped Dayu control water and became a god after his death. When Meng Tian attacked Chu, he stopped in Xiangcheng, near Zhongshan, preparing to hold a large-scale hunting operation to intimidate Chu, so he called his men and used Lianshan to predict the time, place and people.

The fortune teller congratulated him: "The animal to be caught this time can take its hair as something to write a book. In the future, the whole world will write with this kind of thing. " So Meng Tian started hunting, rounded up the Mao Ying family and pulled out their hair.

Later, Meng Tian brought Mao Ying back to Qin Shihuang. Qin Shihuang asked Meng Tian to bathe Mao Ying in the pool, and gave Mao Ying a fief in Guancheng, and named him Guanchengzi.

Mao Ying has an extraordinary memory. From Dayu to Qin Shihuang, he wrote down in detail books on Yin and Yang, divination, physiognomy, medical treatment, alchemy, national surnames and a hundred schools of thought contend. Therefore, later generations took Heguan as their pen name.