Rebirth of Jin Yiwei, Starting from the Experience of Killing the Demon Liver

In the sixteenth year of Jingan's reign, the sky collapsed and demons came to the world, causing all life to be devastated. After countless years of struggle, humans finally reached a stalemate with demons. Su Tang came to this world unexpectedly. It looked like a different world during the Anti-Japanese War, and then he looked at his own system. What? You will get injured when you slay monsters, but can I gain experience by killing monsters? Can Kung Fu be upgraded with skill points? Then don't blame me. Along the way, you can rely on experience and upgrades to cultivate the path to immortality, and fight to make all living beings equal! Su Tang pulled out the saber from the chest of a big demon and looked up at the demons in the sky. "You monsters, who else is there?!"