The four towns of the Xuanhan Dynasty were enfeoffed, and the four princes were not hereditary. Tiantingsi had direct access to the emperor. The old wound in the sky, the "sky gap" will reopen, leaking from all directions causing disasters: Dongwu, Xibing, Nansui, and Beihan. The national master used the pure and turbid qi to deduce the general trend and secretly fell into a trap. On the thirty-seventh night of the strange fog in the East China Sea, the Black Tide Alliance took advantage of the chaos to plunder, the price of salt fluctuated, and the temple fires were raging. The rumors of the "sky gap" were deliberately spread by visitors from the north, and the final decisive battle within a hundred years was approaching. Zhang Ziyi, a young man, rebelled after his father died, and his family's motto is "First the people, then the merits". He stepped into the trend under the temper of Zhendong Hou Han Guanlan and the temptation of Tianting Si Pei Wujiu - the secret greenness in his body may determine the split and union of the East China Sea and the world.