Second Lieutenant Yang Quyou transmigrates by accident while on a mission. When he opens his eyes, he is on an ancient battlefield in a parallel world.
"Good news, folks, I transmigrated! Bad news, there's a bunch of guys on horseback over there, all scruffy and scary-looking!"
Just as he prepares to keep his head down and wait things out, he's told his father is a great general. With a start like this, maybe he should just blow his cover right away!
But who knew that revealing himself would make him the darling of the entire court?
The emperor dotes on him: "Give me a dozen nephews as talented as this one! Heaven has blessed me! Hahaha!"
The empress gazes at him affectionately: "Good child, what do you think of my daughter? Why let an outsider have her?"
The crown prince follows him around every day: "Brother-in-law! Brother-in-law! Take me with you!"
Since there's no way out, he might as well throw himself into the work!
His father and uncle think flintlock guns are too slow? Yang Quyou whips out a breech-loading blueprint: "Too much trouble? Then how about this?"
The chancellor clutches the paper and weeps. Yang Quyou waves a hand: "Let's get printing underway, open the imperial examinations, and sweep all those powerful clans away!"
From then on, the empire's whole approach changes.
Abroad, he leads the cavalry across the grasslands, beating the Xiongnu chanyu so badly he questions reality: "How can a Han man fight more like a Xiongnu than I do? I'm the Xiongnu here!"
The nations of the Western Regions tremble: "We've learned our lesson. Please spare us!"
As for that island to the east...
The island's natives: "######!" (Ten thousand words of profanity omitted here. They are definitely swearing up a storm.)
This princess [you taste it carefully]
Is it Yang Wuyou or Yang Quyou?