Great Tang: The Super Academy of Engineering

By chance, Luo Shiyi, a modern man, transmigrates to a parallel Tang Dynasty.

His status is awkward: he has no powerful position to speak of.

Fortunately, Heaven has not abandoned him. He has an Education System in his mind.

Unfortunately, there aren't many things he can buy.

Still, it's enough.

When the Turks attack,

Luo Shiyi can stand atop the city wall, holding an RPG, and tell them:

"Sir, times have changed."

This novel and its characters are entirely fictional. Any resemblance to actual people or events is purely coincidental. Do not imitate.