A Doctor Who Crosses Two Eras

Lin Sanqi unexpectedly discovers that he can travel through any door to 1959, so the impoverished Lin Sanqi wants to use this cheat ability of crossing between two eras to start making money by "traffic monetization." He brings traditional Chinese medicine knowledge and medicinal herbs from that year to 2023 to get rich, while also taking modern medicine knowledge and drugs from 2023 back there to treat illnesses and save people.

Yes, this is a story about a doctor traveling between two worlds. (Not a purely medical novel)