Global Superpowers: I Cultivated an Underground Kingdom

As a quasi-freshman who had just graduated from high school, Wang Pingyi had a car accident while delivering food part-time. He accidentally awakened his system and became a superpower. What? There are strange monsters running rampant in this world, don't panic, I'm here! Let them see my underground kingdom. The ancient seal is broken and the strange demon channel is opened. Let's see how I, Wang Pingyi, handle this little strange demon.