I Asked You to Slay Demons, but You Recruited the Demon King into the County Government?

The imperial court ordered Su Mu to kill a hundred demons within thirty days, but he discovered that the rat demon that could dig holes could build canals, the spider demon that could spin silk could run a weaving workshop, and the murderous fox demon was actually the number one worker in the world - so the poorest county in Dajing became a place where demon kings would queue up to apply.