Chen Yan, a theoretical physicist in the 23rd century, accidentally traveled to the Qin Dynasty due to a string theory experiment, and his consciousness attached to the body of a down-and-out alchemist. Relying on the future scientific database, he used basic physics to improve the production and military of the Qin Dynasty, helping the Qin Dynasty break historical inertia and unify the world; he then promoted the iteration of civilization, from the steam age to interstellar navigation, balancing the direction in the conflicts of factions such as machinery, biology, and symbiosis, and ultimately led mankind to contact alien civilizations, break through dimensional restrictions, and move towards the ultimate civilization.
