513. Someone deliberately sabotaged the equipment.

Bo Qingsheng's room was filled with many precision instruments.

Upon entering, Bo Qingsheng immediately handed a set of documents straight to Lin Wu.

"Since my arrival, I've arranged for three separate groups to head to Heibei Mountain in hopes of finding an entrance. These are the communication records with them. The pattern was the same for all: everything was normal at first, but once it passed midnight, all contact was lost. When we sent people to look for them, they found nothing. Not even remains," Bo Qingsheng said in a grave voice.

Bo came later but had maintained contact with Bo Yuting before, so his understanding was a bit deeper.

He continued, "Going back further, when Ninth Master was here, it was also the same. Communications were cut off after midnight the night they set out for Heibei Mountain, and despite all attempts, the signal couldn't be restored. The people brought by Ninth Master found nothing when they went to search for him."