King Qin Zhaoxiang established Yingzhu as the crown prince, and the prince had more than 20 sons, but he had no sons with the prince's wife, Mrs. Huayang. Yingzhu and the crown princess Xia Ji have a son named Yingyiren. Ying Yiren was sent to Zhao as a hostage since he was a child, when Qin attacked Zhao many times, the two countries continued to fight, and the relationship broke down, and Ying Yiren's situation in Zhao was very difficult.
Lu Buwei, a wealthy businessman of Zhao State, went to Handan, the capital of Zhao, once. learned about the difficult situation of the Ying Yiren. At the same time, he learned the details of the crown prince. With the eyes of a businessman, he discovered the huge business opportunities contained in it, and couldn't help but roll his eyes and excitedly said: "Great, I finally have a strange thing to live in."
Lü Buwei immediately brought a lot of money and gifts to visit Yingyiren, and when he saw Yiren, he didn't go around in circles, and said straightforwardly: "I heard that King Qin Zhaoxiang is old, and the crown prince Yingzhu will soon be on the throne, but who is likely to be made the crown prince?" Son, you have more than 20 brothers, who are in the middle, and you have never been favored by the crown prince, and you have been a hostage outside for a long time. If the crown prince Yingzhu ascends the throne, there is almost no possibility that the prince will be made the crown prince! ”