After I am admitted to the Department of Medicine of Xiamen University and graduate, can I work directly at the Southeast Hospital Affiliated to Xiamen University?

Being admitted has no direct relationship with work. Graduation from college now does not include assignments! It's just that you studied medicine and applied for the Department of Medicine of Xiamen University. As its affiliated hospital, you may have more internship opportunities and know people. The chances and probability of getting into a letter are much higher than in other hospitals. !

Good luck and success!