The Evil God Descends, I Own Great Hell

As the apocalypse begins, an evil god descends and devours humans, putting China in danger. The invaders do not know that the protagonist controls Demon-Suppressing Hell, a prison where countless Chinese gods and ancient monsters have been confined for thousands of years. Now the Warden intends to unleash them to destroy the foreign gods and cleanse the human world. There is also an offer for any evil gods willing to surrender: a place in the Great Hell, where they can work sewing machines in exchange for meals and lodging.