Therefore, in order to sincerely make Shang Yang loyal to the cause of political reform, Qin did not hesitate to let Shang Yang enter the ever-victorious Qin royal family. He was a direct member of the royal family and was a typical mentality of "reluctant to part with his children, but unable to trap wolves".
This is the significance of the emperor's systematic establishment of "Hou" to maintain the purity of the throne. "Hou" means "the invisible ruling power behind the emperor". Like Qin, Qin Shihuang used the power of Chu as the guarantee of his kingship for a long time. In order to unify the six countries, the reason why Qin Shihuang didn't set up a post station was to put an end to the interference of Chu forces, so that Qin Chu ruled the world and the Qin Dynasty unified the world. Therefore, the Chu people are most opposed to Qin's unification of the world.
Let's go back to the problem itself. Why not let the eldest son succeed to the throne, but let Liang succeed to the throne? According to historical records, Ying Quliang was about 20 years old when he ascended the throne. He should be his son, and he married his wife after returning to Qin. The eldest son is an illegitimate child brought back from Wei. That is to say, at the age of 10, he fled to Wei, and later married a daughter-in-law in Wei and gave birth to his eldest son. In his thirties, he returned to Qin to inherit the throne and should have brought his wife and children back. The history books didn't say where Yinglian was married in Wei, but Daniel speculated that it should be Wei. Because he is young and helpless, and has fled to other countries, he must find a force to rely on. Even if he can't help him return to China to succeed him, he has many wives and relatives and caregivers in the local area. Therefore, the wife who won Lian Po's return to Qin should be Wei.
So here's the question. Although the ministers and generals of Qin supported Won's succession, they certainly did not support the eldest son who was brought back. After all, I brought it back from abroad. Who can be sure that there is no arrangement for Wei? Therefore, starting from the long-term interests of Qin, Qin Xiangong must get another wife of Qin, so the second son won the canal beam. Later things can be understood. After Qin Xiangong's death, who should inherit the throne of Qin? The only answer is to take the canal beam! As for winning, taking the initiative to give way is the wisest choice. Otherwise, the royal family and subjects of Qin will never agree. In this respect, history books only vaguely mention it, and Qian Ying is an illegitimate child.
This is the real reason why Qian Ying, the son, took the initiative to give way to his younger brother to win the canal beam.