Li Chengjun transmigrates to the Tang Dynasty, and his phone unexpectedly connects to the Firmament.
Every time he scrolls through a short video, it gets broadcast holographically across the skies of the Tang Dynasty.
Then one day, he accidentally taps on "Humanity's Ultimate Weapon: The Nuclear-Powered Aircraft Carrier."
The whole realm is shaken! The Turkic khagan is so frightened that he begs to surrender overnight, while the great aristocratic clans tremble in fear.
Li Shimin, the emperor for the ages, rushes into a dilapidated imperial estate, eyes bloodshot. "My wise younger brother, build me that iron ship. I want to sweep the world!"
Li Chengjun looks at the leaky blacksmith's shed and sighs. "Elder Brother, I can build a ship, but first, pay me. Also, I've got my eye on the coal mines belonging to the Five Great Clans and Seven Great Houses."
To deal with his fanatical emperor, Li Chengjun is forced down the path of frantically squeezing every last resource into heavy industry and infrastructure.
From hand-built machine tools to steam-powered mechs, and then to a flood of steel. The great clans are conned into bankruptcy and sent off to dig mines, while the neighboring tribes stay up all night memorizing Tang law, just for the chance to come work in the Tang Dynasty.
Then one day, Li Chengjun accidentally scrolls across "The Wandering Earth: Planetary Engine Demonstration"...
Li Shimin draws the imperial sword and points it at the firmament. "My wise younger brother, I think it's time for the Tang Dynasty to take to the skies!"
Li Chengjun's vision goes black. "Elder Brother, why don't you just behead me first?"