In the early years of the Ming Dynasty, Zhu Yunwen succeeded to the throne after the death of Zhu Yuanzhang, the emperor of the Ming Dynasty. Zhu Di, the king of Yan in Beijing, was unwilling to accept the reduction of his vassal. Other vassal kings were also forced to do so. Finally, Zhu Di decided to rebel and attacked Nanjing in one fell swoop. In the end, there was a fire in Yingtian, Emperor Jianwen disappeared, Yongle became emperor, and the world changed its hands. This battle was called the Battle of Jingnan. Since then, the rivers and lakes have been turbulent, with constant disputes, sectarian disputes and court intervention, and the rivers and lakes are bloody. As for whether Emperor Jianwen survives, there are only constant legends. The rivers and lakes are because Emperor Jianwen is involved. When the Xuanwu Iron Sword comes out, the past is mentioned again, and the secret of the "Red Cliff Book" is revealed.