Ying Dan, the son of the Qin Dynasty, brought the hegemony system to guard the northern border. The marrow-cleansing pill washed out the peak of martial arts, Chen Ping offered poisonous tactics, and Xin Qiji took charge of the tiger and leopard cavalry. He slaughtered the barbarians to establish his authority, and used his family members as hostages to tame his cavalry, hoping to use the vicious trick of Yinshan to destroy the foundation of the Xiongnu. The eldest son, Fusu, was slow in transporting grain, and Meng Tian was worried. The First Emperor's eyes in the Xianyang Palace had quietly fallen on these two sons with very different personalities.
