This Body Enters the Beacon Smoke, and the Mountains and Rivers Change to a New Sky

Bai Siqi, a college student in the Department of Modern History, accidentally traveled into a historical novel he wrote for his own entertainment, and somehow became the young prince of the Northern Liang Palace in the book. The world is in chaos, and traitors are rampant. Does holding military power do nothing or do everything? Does it use the prime minister's script to support the rightful master, or does it really restore peace and order to the world?