Summarize the plot of Zheng Qiwang.

The novel begins with a chess game between Zheng Shouzhi and Ye Zhichun. Zheng Shouzhi lost for the first time, which led to his broken hand. A few years later, Zheng Shouzhi sought a battle with Ye Zhichun, who was defeated. Ye Zhichun was killed by the devil. In order to conquer Zheng Shouzhi, the devil wanted to fight with Zheng Shouzhi to the death, but he was defeated by Zheng Shouzhi. In a rage, the demon tried to kill Zheng Shouzhi, who was blinded by Otto's disease and killed his opponent. Later, he was killed by a group of devils. Zheng Shouzhi's soul quickly spread among the people, and the people rose up against Japan and killed the enemy to exorcise demons.