Generally, you won't pretend, but you can't rule out some people with low quality. I'll teach you a trick to check whether the room is equipped with a camera. Turn off the lights, close the curtains, turn on the mobile phone to take pictures, don't turn on the flash, walk around the room with the mobile phone, if you find a red dot, there will be a camera, but if there is no red dot, there will be no camera.