1, Neurosurgery: Orthopedics doctors often need to involve the nervous system when performing orthopedic surgery, so the orthopedic training certificate also includes the knowledge and skills in neurosurgery.

2. Plastic surgery: Plastic surgery is a medical specialty involving bones, muscles and skin, and it has many similarities with orthopedics. Therefore, orthopedic training can also involve the knowledge and skills of plastic surgery.

3. Sports medicine: Sports medicine is a medical specialty involving sports injuries and rehabilitation. And there are many similarities with orthopedics. Therefore, the training certificate of orthopedics can also involve sports medicine knowledge and skills.