"Professor Yang, what do you want to know?" Li Xiong sat down, a bit tense.
Yang Ping sat down: "Let's let Jingguan ask these questions. I'll just listen from the side."
Officer Yu asked, "Li Xiong, how many years have you been with Professor Zhou?"
Li Xiong said, "I was a chemistry undergraduate at Nandu University, joined Professor Zhou's laboratory for my senior year graduation project, then pursued a combined master's and PhD for a total of seven years. After graduation, I stayed at the university, and it's been another five years now. So altogether, twelve years with Professor Zhou."
Officer Yu nodded: "Twelve years, that's not short. You must know Professor Zhou well."
Li Xiong lowered his head, remained silent for a moment, then said, "I thought I knew him. But now... I'm not sure."
Officer Yu looked at him: "Tell me about Professor Zhou."
