Water Margin is the skin, Journey to the West is the bones. Chao Gai was hit by an arrow in the market. Before he died, he grabbed Zhang Mu's wrist tightly. His pupils were dilated and he murmured: "In the sky... They are watching..." Zhang Mu looked up and saw dark clouds. After Song Jiang succeeded to the throne, he carried out a large-scale construction project to build the "Zhongyi Hall". Zhang Mu was responsible for surveying the foundation, and unexpectedly unearthed a large number of non-human skeletons with one horn on the skull. When Song Jiang heard the news, he wrote lightly: "It's just an ancient battlefield. Bury it back."
