After the battle of Jingnan in the Ming Dynasty, Emperor Jianwen escaped from the palace secretly, and took the imperial seal and the sword of offering sacrifices to heaven with him. Without the sword of offering sacrifices to heaven, Zhu Di could not offer sacrifices to the ancestors of the emperor, so he sent two armies of water and land to investigate the whereabouts of Emperor Jianwen and find out Intent to recapture the sword of worshiping the sky. Feng...