1. Different educational background: the training assistant physician is a medical student who graduated from a technical secondary school or a junior college, and the undergraduate training physician requires medical students who graduated from a bachelor's degree or above to participate.

2. Different employment directions: Training-assisting doctors basically work in first-class general hospitals (community health service centers) after graduation, while undergraduate training-assisting doctors can apply to work in second-class or third-class hospitals after graduation and obtaining training certificates.