Time Traveler: Northern Xia Continues Qin

Xie Yan, a modern history researcher from another world, transmigrates into the Yong Qin Dynasty, a realm modeled after the Qin and Han. With no system and no family backing, he relies solely on his future historical insight, landing in a chessboard of chaos. After the First Emperor of Yong Qin, Zu Long Qin Zheng, dies during his eastern tour, the Palace Coachman Commander Zhao Jin returns to the capital, forges an edict, disrupts the government, slaughters the imperial clan, and manipulates a puppet ruler—the Yong Qin court is overthrown in a single night of bloodshed. Amidst the chaos, as the husband of the fifteen-year-old princess Qin Yinman, he fights desperately to escape, saves the orphaned remnants of the imperial clan, and heads north to Hetao to bide his time. Yong Qin falls, the realm contends, and the struggle among warlords ends with Liu Ji establishing the Yong Han Dynasty in the Central Plains. But from the day Xie Yan arrives, the established history of Qin and Han has already shifted completely. After decades of deep cultivation in the northern frontier, he secretly builds power and spawns the new regime of Northern Xia, originally a vassal of Yong Han. The Han dynasty, meant to last two hundred years, has its fate cut short by its last emperor, surviving only eighty-six years. Yong Han is vast and powerful, its military strength far surpassing the northern Northern Xia, and the two only maintain a ten-year standoff. From peak to sudden decline, the dynasty's end arrives. In just one generation, the mighty Yong Han collapses first and ends completely. A century of chaos lays the groundwork, a great power crumbles, and the tide of the world, rewritten by a single transmigrator, ultimately heads toward an uncertain direction. — Description from novelcodex.org