Zhang Yang, a modern veteran, accidentally traveled to the first year of Zhenguan in the Tang Dynasty and the last three days of the Weishui Alliance. Zhang Yang first relied on the compound bow provided by the system to save the villagers in Shanghe, and then used three shots to disrupt the Weishui Alliance. He helped Li Er break the siege and helped Li Shimin fight off the Turks. However, history seemed to have begun to go astray. . .
