When interviewing civil servants, you must dress formally, which will make you look mature and steady. After all, you used to be the leader of the people, so you must be mature. It seems that I took the civil service exam before I had a friend, but I failed in the interview, so he wore a casual dress and had no money. According to most people's experience, civil servants should first wear formal clothes and suits, which is the key to your success.
If in doubt, please consult the public education enterprises in China.