In 247 BC, this year was extremely important for the entire Warring States period. In March of this year, Wei Wuji, the Marquis of Xinling of Wei, united the armies of five countries to attack Qin and defeated Qin general Meng Ao outside He River. The allied army of five nations pursued their victory all the way to Hangu Pass, where the Qin army shut themselves in and did not come out. After this battle, Marquis Xinling became famous throughout the world.,This year, the State of Wei, severely wounded by the Battle of Yi Que, was still struggling to survive and had no strength to oppose the State of Qin or regain its former dominance as during the reign of Duke Wen of Wei.,However, according to what I know, King Zhuangxiang of Qin seems to have only two sons. How could he become the fifth son However, now Zhou Qing seems to know why there is only a record of two sons in history.。