According to the plan, Shang Jianyao didn't stay on the third floor for long. He went straight to the fourth floor that the room owner's first exploration didn't cover.
When he walked down the stairs that seemed to be copied and pasted and reached his destination, he realized that the light shining in from the windows facing outside on both sides of the room had dimmed significantly.
This seemed very logical because dusk was approaching when the psychological trauma began. Darkness had already enveloped the land, so it was logical for the night to thicken.
However, Shang Jianyao realized that not only was the moon not high in the night sky outside, but there were no stars either. It was pitch-black.