Cultivation, I Just Want to Hang up but Become the Best in the World

Time travel is useless? The system said: It does not exist. Lin Changan bound to the [Automatic Cultivation System of Kung Fu] and started the road to cultivating immortality while idle—— Others rely on hard work to cultivate, but he relies on sleeping. Others relied on elixirs to achieve breakthroughs, but he relied on hanging up. Others rely on their hard work to fight, but he relies on level to crush them. Genius? Everyone in front of him is mediocre. Bottleneck? He had never seen anything like this in his life. When the ancient demon god revived and all races fell into despair, Lin Changan slowly opened his eyes: "Sorry, I've been idle for three years and I accidentally reached the max level."