Easy Cultivation system

it is a story of a man who got reincarnated in a world similer yet different where monsters run rampant day and night. but humanity still stand strong but not for too long it seems,so what can he do? how can he survive in this cruel world? but he doesn't even worry because he has the system that gives him exp just by walking , drinking,eating and sleeping so for hin cultivation is as easy as eating so where can he get by using this system if you want to know then stik around and check my novel out wait for the next chapter.....................................................