Doctor Jiang was in his early thirties, more robust than Huang Zhilei, and was introduced as the attending physician from General Surgery Department One, on emergency shift.
In China, most emergency department doctors come from various specialties on rotation, and there are very few who actually belong to the emergency department.
As for general surgery, it's a very broad concept, which can be divided into many sub-specialties. Thus, the general public usually doesn't understand why some general surgeons treat certain diseases while others do not, and sometimes they seem to treat everything. The main reason is that since hospitals began competitive internships with self-sustaining financial responsibilities, fierce competition under market conditions occasionally leads to stealing patients and performing surgeries from other specialties.