Li Chang'an, an office worker, travels through time.

I'm Li Chang'an, a hardworking office worker trying to earn money to pay for my sick mother's medical treatment. My beautiful but cunning boss stole my work and my prize money, which I was trying to use for my mother's bills. After work, I saw my boss having an affair with my manager, and I filmed it. I tried to expose them to the whole company, but my boss couldn't take it. A heated argument ensued, and during the fight, a Yuan Dynasty ceramic vase fell on both of them, knocking them unconscious. They were then transported through time to become the Crown Prince of the Yuan Dynasty – a useless, incompetent man known throughout the court. Suddenly, I've transformed completely. I'm smarter, more skilled in combat, and I possess many unique weapons. I also have an unlimited supply of modern weapons and equipment, a state-of-the-art warehouse with everything I need, and an online store with automatic unlocking of additional items. I can use modern currency and small stones to purchase items. Furthermore, I have an automated system that completes construction in one minute. I plan to build a secret integrated base for all three branches of the military: the army, air force, and navy. The most modern technology emerges, and a cunning female leader transmigrates into this world as the Empress. She uses her modern knowledge to survive in this ancient era and secure the throne, but she is unaware that Li Chang'an possesses advanced weapons and numerous tools to counter her. Furthermore, Li Chang'an has fallen in love with the princess of the Yong'an Kingdom, and together they navigate various events.