What Should I Do If I Assassinate the Ghost King but End up with the Golden Rice Bowl of the Ghost World?

[Revise frequently! ] Pei Lan thought he would be a Taoist priest all his life, until his brother who had been raising him was killed by the ghost king. He became an assassin, a killer, a ghost thief... But the ghost king was difficult to kill and forced him to work. So he had a new identity: explorer, treasure hunter, detective, sweeper, dishwasher... Purpose: Protect the environment