Sun Hang returned to the passageway—moving through walls is indeed more convenient, but in the void space "outside the scene," there are no markers; front, back, up, down, left, right, it's all a blank slate. It's fine for a short stay, but moving a long distance in there can easily lead to losing direction, stumbling into some inexplicable places.
With a map in hand, Sun Hang decided it was more prudent to honestly follow the path "within the scene."
The greatest use of the void space is still helping Sun Hang bypass obstacles that are difficult to overcome under normal circumstances.
Sun Hang searched two more rooms and, like before, they were quarters for soldiers stationed on the island. The only difference was that one room appeared to be a female soldier's quarters, with two packages of tampons, whose labels had long faded, at the bottom of the locker.