It shouldn't be like you said. Each location (room) is separated, and the corridor is supervised by discipline inspection and other units. If conditions are good, there is video surveillance.
And the examiner will be quarantined. If you eat on the spot, there should be no chance before and during the exam.
For example, how much is it worth (tens of thousands, or hundreds of thousands) to have someone to help you run this relationship? Can people's job prospects be measured by this money? More importantly, the current examination system is so perfect that only a fool would take the risk.
The above views do not mean-crazy public examination (irrelevant to this), landlord, intention, etc., one strength is one point! Finally, I wish you an early landing.