The requirements for German medical doctors to return to China after graduation include application conditions, relevant procedures, training cycle and training contents, as follows:

1. application conditions: hold a doctorate in Germany, pass the examination of the German Medical Association and other relevant institutions, and obtain a German medical license.

2. Relevant procedures: Before returning to China, you need to apply for relevant documents from German Medical Association and other relevant institutions, including German doctor's license, medical doctor's degree certificate and German medical association training certificate.

3. Time limit for training: you need to participate in domestic medical training after returning to China. The general training period is 3-5 years, and the specific time varies according to the requirements of different provinces and majors.

4. Training content: During the training, you need to participate in the clinical work and scientific research work of relevant medical institutions, and at the same time, you need to take national and local medical examinations to meet the standards of domestic doctors' practice.