RGB AI cameras can identify more than ten common objects, such as slippers, socks, cables, trash cans, scales, and other objects. 3D line lasers can accurately detect and avoid obstacles above 2cm. However, obstacles below 2cm that have not been trained with AI cannot be identified and avoided. Also, since AI training for RGB has not yet been conducted in the dark, obstacles in the dark cannot be identified for the time being, and can only be detected and avoided using 3D line lasers. So that 0 collision can not be achieved. Till now, no manufacturers can declare their device can achieve 0 collision.