Ding Changshun and Tian Xiaolan Huo Lvmao are key characters in the novel Mountain Wild Doctor, a work that depicts the legendary experiences of a protagonist named Lin Fei. During his internship at the People's Hospital of Yongning County, Lin Fei's fate was very different from that of other people, as he failed to be successfully converted into a full-fledged doctor, and was instead sent to go deep into the countryside to experience grassroots medical services.
In this dramatic turn of events, Lin Fei reveals his unique talent - a handful of miraculous medical skills. His life is changed by the accident of a small black red-dotted snake, and he embarks on an extraordinary journey from there. In this chance encounter, he meets Ji Da, a white-bearded old man who claims to be a Western Zhou Founder. Deeply regretting that he was unable to pass on his skills to his descendants during his lifetime, Ji Da decides to teach Lin Fei the skills of Tong Tian Zhi Di at the last stage of his life, expecting him to carry this knowledge forward.