In the cosmic tunnel, everyone's mind power and various perception abilities were suppressed by the natural power of the cosmic tunnel. It was only when Xu Tui was five kilometers away from the blocked light screen that the guards in the blocked light screen noticed Xu Tui with their naked eyes.
This was also the reason why Xu Tui did not deliberately hide himself. If he had deliberately hidden himself in the shadows of the cosmic tunnel and approached, he would have to be three to four kilometers away.
"Who is it?" someone shouted from one of the towers.
Xu Tui could not sense this person's cultivation even though his mental perception was suppressed. Currently, his mental perception radius is about seven kilometers. Under normal circumstances, he could only sense a radius of about 700 meters in the cosmic tunnel.