How do you think teachers are willing to give students nicknames?
I think this question can be understood as follows: First, your surname is Xiong, and the teacher thinks you are cute and study hard. The teacher calls you Xiong Xiong, because you like your performance very much, just like loving your own children, full of deep love and intimacy. Why do you care? Besides, Xiong Xiong is still our national treasure, and I think this name is very nice. Many parents named their baby Xiong Xiong. It doesn't matter. Focus on your studies, that's the most important thing. I believe the teacher is harmless. I wish you progress in your study!