This was because they were not members of the Level 8 laboratory. They only had the authority to visit the laboratory for a year.
According to the rules, Cao Yanhua did not introduce Qiao Nian and the others to the other members of the laboratory.
Instead, he told them about the laboratory's composition and introduced which things could be used by them and which things could not be casually taken.
He told them about the places they could enter, what places were secret and the forbidden areas…
After Cao Yanhua took them around briefly, he pointed at the lounge at the side and said to them, "Alright, I'll leave you here. Stay in the lounge today. I'll look for you later. If I have time, I'll show you some experiments."
