I Asked You to Be a Useless Son-In-Law, but You Formed an Invincible Divine Machine Battalion?

Gu Beichen is just a useless prince. But, the emperor wants to kill him! The prince wants to kill him! The other prince brothers will also kill him! So. He was forced to train an invincible divine machine battalion team to protect himself! He was forced to build AKs and cannons to fight against the strangulation of millions of imperial cavalry! A few years later. All the generals knelt down to beg Gu Beichen to ascend the throne and put the dragon robe on him. Gu Beichen laughed proudly: "Hahaha, my dear friends, this is really embarrassing for me!"