凯利公式视频讲解

简介：In the seventeenth year, Li Zicheng's army pressed the border and sent a letter to Xu Biao to persuade him to surrender. Xu Biao cursed, tore up the letter, killed the envoys, patrolled closely, and decided to fight to the death. However, the Chinese army Xie Jiafu had already secretly defected to Li Zicheng. When Li Zicheng's troops arrived, he immediately bound Xu Biao, then opened the city gate to welcome Li Zicheng.