After those two people left, the laboratory returned to the tranquility from a moment ago.
However, the glass door was quite peculiar.
Gu Qiaoqiao stood in front of the door, scrutinizing it and the glass, as if they had melded into one. There wasn't any doorknob to be found, and she hadn't noticed how those two had opened the door earlier.
She vaguely recalled that they had pressed a series of numbers on the door.
Gu Qiaoqiao looked towards the door.
Unfortunately, it wasn't visible to the naked eye, so Gu Qiaoqiao placed her hand on the glass door.
Her fingers emitted spiritual energy as they traced along where she had vaguely seen before, and then she felt a section with some orderly protrusions, like buttons on a telephone.
Gu Qiaoqiao realized these were numbers, but she didn't press them because she didn't know the code to open the door, so she had no choice but to give up. Meanwhile, Xiao Wen had already looked around the basement.
