Introduction: Chen Yuanqing, a modern time traveler, is in the Qin Dynasty after the unification of the six kingdoms. He ordered the Mohist craftsmen to build a large bright lamp that could only be used in the Yuan Dynasty to automatically tell the time in advance, so as to prevent the court from delaying the arrival of his father Chen Zhishan and reassure him. The original Qin law was used to control domestic slaves in the monthly examination. Those who scored perfect scores were retained and those who failed to answer questions were sent away. The laws were strict but lenient and gentle. He had a thorough understanding of the Qin Dynasty's national policy and official selection system, and avoided the dead ends of military merit, appointment, and conscription. He planned to take advantage of the opportunity of the text revision of the Zhanyan Office to be elected to the court as a doctor based on his talent in legal writing, and disturbed the structure of the Qin Dynasty.
