There's a Knife in the Fruit Basket, and I Transmigrated as an Ancient Physician

He was sent off with a knife for accepting a fruit basket on behalf of his department head. When he opened his eyes again, he was in ancient times, inside a coffin, with a Divine Doctor System bound to him. System: Congratulations on being selected for the protagonist program of Ancient Divine Doctor! Xu Ansheng: I already died, and now I have to go to work? System: One pack of fever medicine costs 260 points. Cross-world shipping is expensive. Xu Ansheng: ...Then I'll use herbs. With modern medicine leaving ancient physicians in the dust, he face-slaps his peers and makes a name for himself. But all he wants is to return to the modern world. On one condition: the System must stop scheduling overtime.