After Shang Yang's political reform, the prince made a mistake, but the prince of a country made a mistake and could not be punished directly. So this punishment was imposed on the monk's teacher, who happened to be a monk, so he was given a slap in the face.
Of course, this is the image of Qian Qian in the Daqin Empire. There is indeed a man named Gong Ziqian in history, but this does not mean that Gong Ziqian is Qin Xiaogong's brother, and there is no conflict in Qin Xiaogong's succession. However, Gongzi Qian is indeed the teacher of the Prince, the first fu, and the other teacher is Gongsun Jia.
Shang Yang just started the political reform, few people took it seriously, and Prince Zhu didn't take it seriously, so he made a mistake. Shang Yang insisted on punishment, but Gong Ziqian and Gong were the two teachers who accepted the punishment. Gong was questioned and Gong Ziqian was punished. This punishment made Qin see Shang Yang's determination, and the political reform went very smoothly.
As a result, it was not long before Gongzi Qian broke the law himself, was punished by Shang Yang, and his nose was cut off. The hatred between two people was forged at once.
Gong Ziqian, as a representative of the nobles of Qin State, hated Shang Yang's guts. After Qin Xiaogong's death, Gong Ziqian joined forces with the aristocratic forces of Qin to attack Shang Yang, who was dismembered. Later, Gong Ziqian never appeared in the historical records.
In fact, the appearance of Gong Ziqian in Historical Records is related to Shang Yang. He is the representative of the aristocratic forces in Qin State, and naturally stands on the opposite side of Shang Yang. It's just that Shang Yang has the support of Qin Xiaogong, and they didn't have any choice. After Qin Xiaogong died, they took action against Shang Yang.