The physical examination of civil servants is usually about one week after the interview.
Civil servants are a profession that needs to deal with many people. The main reason of civil servants' pre-employment physical examination is to check whether they have infectious diseases. If a person with infectious diseases becomes a civil servant, there is a great chance to spread the infectious diseases to others.
Civil servants are hard work. Physical examination is also a certain degree of examination of the physical condition of the relevant personnel. People with poor health can't adapt to the relevant work of civil servants.