Great Tang: Crown Prince Who Guards the Nation, King of Industry in the Zhenguan Era!

In the fourth year of Zhenguan, corpses litter the Guanzhong region!

Li Mo has the Millennia of Civilization System and, from the start, uses drought-resistant seeds and improved waterwheels to make the wheat fields in Willow Tree Village, Lantian County, ripple like waves, yielding five dan of grain per mu!

Who could have expected that the bumper harvest would bring back the father who'd been missing for eighteen years?

Li Shimin stares at the boy who looks exactly like him and is dumbfounded too.

I came to investigate something. How did I end up with a son right here?

Li Mo thought that at last he'd have a real father to rely on in the Tang Dynasty. Instead, Li Shimin starts hanging around his courtyard every day.

"Son, this waterwheel is excellent. Hand it over to the state."

"These potatoes yield well. Let's spread them everywhere!"

"This steelmaking method... Son, how many more good things do you have? Bring them all out. Your father is going to conquer a vast territory for you!"

Li Mo looks at the gunpowder, steam engine, and aircraft carrier in his System...

He's doomed. This shameless adopted father plans to squeeze him dry!

Is this what having a father is supposed to be? Isn't this more like taking in a bandit?

Father, are you planning to become emperor? Then why not start a rebellion?

You're a general, and I have the money and supplies!

You handle the troops, I'll handle the money!

Maybe we really can put someone else on the throne of the Tang Dynasty!

Li Shimin: ??

I fought tooth and nail to seize the throne, and now this brat is asking if I want to rebel against myself?

Fine, I'll come clean. No more pretending!

Son, your father is the emperor himself!

Li Shimin!