C512 Have been set up by someone

Lin Zhenggang saw that there was something that looked like a whistle in his hand, it was black, and it was rather small. Lin Zhenggang's eyes were opened wide, he anxiously looked over and did not recognize what it was. He quickly asked, "What is this?"

Lin Zhanyong chuckled and said: "Old Gramps, this is a good thing. I won't talk to you about the specifics, but I'll just tell you a few words