Summary: After six generations of savings, unification was achieved. The eldest son, Ying Mo, secured his position as prince with his illustrious military exploits. When he led the troops to resist the Huns, he fell into a well-planned ambush trap, and none of the 30,000 soldiers survived. When the news of his death reached Xianyang, Yingzheng's anger broke out and he sent Li Xin, Wang Ben, and Zhang Han to the north to fight against the Xiongnu for five years. The Xiongnu evaded the real situation and attacked the fictitious border. There was no peace at the border. The First Emperor became increasingly haggard. He never let go of the hatred of his eldest son's murder. He continued to fight against the Huns on the surface, but secretly instructed his confidants to thoroughly investigate the mastermind who leaked the secret marching route and colluded with foreign enemies.
