I recommend Blood Path to you. The protagonist, Ye Qingxiao, was reborn in the body of a down-and-out servant named Lin Luochen in the Heaven's Origin Sector of the Yellow Region. He became a divine doctor and alchemist, and began his cultivation journey. He kept cultivating his internal energy and found nine medicines to refine pills. In the end, he became a mighty figure who cultivated both medicine and martial arts. I hope you like this fairy's recommendation. Muah ~😗