The younger Teacher Zhang was quite serious and humorless, but it was clear that Teacher Zheng was the one in charge between the two.
After exchanging a few more pleasantries, Tian Yan said, "Well then, I'll leave Qiao Yu in your hands."
Following that, Tian Yan looked at Qiao Yu seriously and said, "Qiao Yu, safety is no joke! You must listen to Teacher Zheng and Teacher Zhang."
"Don't worry, Director Tian, I understand."
...
"Teacher Zheng, Teacher Zhang, do you know Teacher Wen who taught me confidentiality before?"
"Teacher Wen? We probably don't know them. But, for someone who teaches confidentiality, besides classroom content, anything else they tell you might not be true. Including their surname."
"I see! No wonder I can't find them anywhere!" Qiao Yu nodded.
"By the way, Teacher Zheng, when Teacher Wen taught me confidentiality, they talked a lot about cases of researchers being negligent or bought off by spies.
