He stood up, walked towards me and tried to take the paper from my hand. He dared to grab my arm and my hand to recover his crib. Seriously, I couldn't believe it. I told him several times to stop his nonsense which he finally did. He left the classroom but came back at the end of the exam to show me a letter of apology, which I refused to read. And then again, he was very "touchy-feely", grabbing my arm etc. I finally made him understand that I wasn't his friend and that I would not change his grade. Maybe he thought he could intimidate me by being aggressive and rude... But seriously, it's the first time I witness such a behaviour from a student. This is disgraceful. And I am very surprised to see that some students from Tianjin University think they can behave in such a disrespectful way.