When Yin Zheng takes Yin Qi out on a mission, he learns about the impact of the road closure at the border between Dan Plains and Dai Plains on the local merchants and decides to let the people pass before reporting it. That is exactly what Yin Song wants and therefore, he's accused of overreaching his authority. As soon as Yin Zheng and Yin Qi return to Xin Plains, they are held accountable by the Xin Plains Master.