Complex sentence: Zhong Yu Tang, who was the best student in his class was put in charge of him by the teachers, however she treated him harshly for being the worst student in the class, but he didn't care because he had a crush on her.
Split into simpler sentences: Zhong Yu Tang, who was the best student in his class was put in charge of him by the teachers. However, she treated him harshly for being the worst student in the class but he didn't care because he had a crush on her.