I used to read this novel on xianxiaworld I think. I checked their releases and it wasn't there. It was about a dude who cultivates and he finds a stone on a corpse in the sewers and upon picking it up he receives a message from a cultivator from another world (the corpse) asking him to destroy the devils which he recognises as earthlings in spaceships so he says welp not happening. The stone lets him speed up his cultivation. He goes to a black market City to take illegal cultivation drugs. He is teaching his cats to cultivate. He is a hypnotist. The stone he got from the corpse interferes with wormholes when traveling to other worlds. There are mech suits. His dad escaped from his family after creating a cultivation drug for them. I think their family name was Jiang and they ran the Sun and moon company.