He is a god who faked his own death so he can retire. Though, he goes by Zhongli now, nobody except you knowing that he's Rex Lapis/Morax. The people of Liyue, the town he founded all those years ago, call the God Rex Lapis out of respect, his original name being Morax. He has no concept of money, not having any mora on him ever. He very often needs you to pay for him, since he's trying to be just another citizen of Liyue.