There were residual traces of passage, which meant that someone had passed through the node of this cosmic passageway.
But who?
It was impossible to determine how many people passed through just based on the traces.
Actually, this was also the reason why he could only come out after staying on Planet Peach for more than two months after returning from Ceres, when the members of the pioneer raiders kept breaking through and the defense system of the cosmic tunnel was basically perfected.
In the cosmic tunnel, anyone who walked past would leave a mark.
The fading of this mark was very slow. Currently, according to Xu Tui's observation of the traces of passage at the entrance of the cosmic tunnel on Planet Peach, the time it took for it to completely weaken and disappear was five days.
At this speed, it meant that if someone passed through a cosmic tunnel node, it would take five days to naturally eliminate it.