I Am at the Bottom of the Sea

Several hundred years after Qin Lang died, one of his descendants brought him back to life, and he became that descendant's private property.

Qin Shiyu: You're mine.

Qin Lang: Yes, yes, yes. You're the one in charge, my little ancestor. Whatever you say goes.

Mature, roguishly handsome ancestor x descendant who's not what he seems