The lens of the college entrance examination may be watched later. If there is cheating in the examination room or someone reports that there is something wrong with an examination room after the examination, the relevant departments will find the corresponding video materials for investigation, or they may randomly check.

At the beginning of cheating in the college entrance examination, according to the requirements of standardized examination rooms, the standard-definition cameras in the examination rooms have been gradually replaced by high-definition cameras. The surveillance video can clearly see the invigilator and the examinee's every move in the examination room classroom, and the students' expressions and writing actions can be clearly seen.

Once candidates are found cheating, they will use the multi-focus function to enlarge the video to prevent problems before they happen and notify the invigilator. After the video content recorded by the surveillance camera in the college entrance examination room is partially enlarged, the examinee blinks and the handwriting on the roll surface is clearly visible.

Extended data:

The surveillance camera in the college entrance examination room not only requires live shooting of high-definition video, but also supports 24-hour uninterrupted monitoring, and the data will not be lost after power failure.

In addition, all surveillance cameras in the examination room are basically connected to the national education examination monitoring platform, that is, all provinces and cities can see the examination room of each test center, and the video content monitored and recorded in the examination room may be randomly selected and played back to see if there is any violation.