The purpose of civil servant interview is "fairness, justice, openness and transparency", so in order to make every candidate equal, the examiner draws lots to divide the examination rooms like the candidates before the exam, that is to say, he doesn't know which examination room he wants to invigilate and which examination room has which candidates. Candidates should be numbered as soon as they enter the examination area, and their names should be called if they don't arrive. Your personal information will not be revealed, even your name is not clear to the examiner, let alone your party member identity! I hope it helps you!
If in doubt, please consult the public education enterprises in China.