Isn't It Forbidden to Fall in Love?

(Don't look at it, it's a trap) A person died at Yecheng University, named Su Qianqian. Yecheng police officer Cheng Cheng participated in the investigation of this case. Find Bai Bei, the last person the deceased contacted before his death. In the transcript: Officer Cheng: "The last time you met the deceased, what did you talk about?" Bai Bei: "The deceased? Who is that? I don't remember..." Officer Cheng: "The deceased is your friend Su Qianqian." Bai Bei: "Who is Su Qianqian? Do I know him?" … Bai Bei, who last saw the deceased, seemed to have lost his memory and could not remember anything. —— This is a story about a police uncle who happened to find a little ancestor when he was handling a case... Officer Cheng: Isn't it forbidden to fall in love? Everyone: Yes, falling in love is not prohibited, but showing affection is prohibited. Thank you.