Space-Time Anchor: Guarding the Tang Dynasty

In 2139, the overworked postdoctoral researcher Lin Yu accidentally activates a modified time-space controller and transmigrates into the body of an impoverished scholar in the prosperous Tang Dynasty. The moment he opens his eyes, he faces a debt of fifty cash and a "wife who shared his hardships." Bound by a three-year countdown to return and an ironclad rule against changing history, the mustard-seed ring he brought from the future becomes his only support. Hidden inside it is a foldable flying car, along with the secrets of chemistry and physics he needs to survive. When soap pods meet wood ash, and ten coins collide with the Tang trade routes, watch this future PhD brew soap with hard science and seize business opportunities through cleverness, fighting for survival in the narrow space where he can avoid crossing history's red lines. He is a traveler moving between past and present, and a game changer who turns his fate around with intelligence. A survival fantasy where technology intertwines with ancient charm begins here!