You Told Me to Be a Good-for-Nothing Son-in-Law, but I Built an Invincible Divine Engine Battalion?

Gu Beichen is nothing but a useless prince.

But the emperor wants him dead!

The crown prince wants him dead!

His other royal brothers want him dead, too!

So...

He is forced to train an invincible Divine Machine Battalion to protect himself!

He is forced to build AKs and cannons to resist the million-man cavalry of the empire!

Years later,

all his generals kneel and beg Gu Beichen to ascend the throne, even draping the imperial robes over him. Gu Beichen laughs smugly:

“Hahaha, my dear ministers, you're really putting me in a difficult position!”