From the Start, Bound to a Nation-Destroying System, I Only Want to Return to the Modern World

He binds himself to a Nation-Wrecking System. As long as he can squander the country’s national destiny, he’ll be able to return to modern times and enjoy his life.

Xiao Xuan is overjoyed and immediately orders the army disbanded, military spending cut, and the borders opened.

But when an enemy nation invades, the disbanded border troops organize themselves and crush the enemy.

“Report! A great victory at the border! Thirty thousand warhorses captured!”

Xiao Xuan is dumbfounded. How did trying to ruin the country somehow bring about a golden age?