The main problem is the level. Generally speaking, interns are residents, followed by attending physicians, deputy chief physicians or above, and chief physicians or above. Different responsibilities, different levels. From low to high, residents, attending physicians, deputy chief physicians and chief physicians are in turn. Residents and attending doctors have been in the inpatient department for a long time. Although the deputy director and director also work in the inpatient department, they basically only take a look at it in the morning rounds. Then there are consultations everywhere, to expert clinics.

Medical college graduates have to be residents for a few years at first, and after a few years of work, they can be promoted to attending doctors, not only directly treating patients themselves, but also guiding the work of residents.

The word "resident" comes from abroad, and American medical college graduates want to become hospital residents. As the name implies, this kind of doctor can eat and live in the hospital 24 hours a day, and handle the patient's condition changes at any time, which is the only way to train doctors who can really see a doctor independently. It has been tried before in China, but it has not been fully developed in the end. Some hospitals only require residents to eat and live in the hospital 12 hours to go home and sleep.

Generally speaking, only deputy chief physicians are considered experts, but not all deputy chief physicians are experts. The deputy chief physicians in some small places can only be regarded as local "experts" at most.