Zhang Yichen pulled Ran Zhihan back into the bedroom and said to her, "Zhihan, I know that you were in our son's room just now, and you want to say something to me, but I hope you won't stand up and plead for him anymore. Haven't you noticed? Since he came back tonight, he's been off. I don't know what he's gone through, I have no idea who that 'strange grandma' he mentioned is, and I certainly don't know why he has suddenly changed like this in one night. Do all of you really feel like he's a stranger tonight too? Does each word he said sound like something our son would say to my parents? Our son is definitely not that kind of person, unless that person said something to him that deeply moved him, and that's why he became what he is tonight. And I must find out who that person is, who dares to mess with my son."