C216 North Water Departure

I couldn't hold back the suspicion and asked: "Instructor Luo, how did you know about Tang? If I remember correctly, we never mentioned Tang's name nor did we chat with him in front of you, right? "

Instructor Luo was still thinking about the case, but when he was questioned, his expression changed slightly, and he returned back to normal. He said: "Um, previously when my student contacted me