If Haoren Xiong has a million haters, then I am one of them. If he has ten haters, then I am one of them. If he has only one hater then that is me. If Haoren Xiong has no haters, then that means I am no longer on earth. If the world loves Haoren Xiong, then I am against the world. His accent, monotone voice, and lack of explanation in much of his work make lectures terrible, at least they were recorded. 64% avg on the final, DO NOT take Haoren Xiong for 31B

This class should be an Eighth Amendment violation. This class is a Biz Econ major's nightmare. If you take this class after reading all of the negative reviews, do not say that you were not warned.

Xiong is to Math 31B what Ebert is to Math 32A. Xiong's exams deviate so much from our practice material that it is mind boggling. Even though he may have barely gone over it, he assesses squeeze theorem, triangle method (Fall 2024 Final), and induction. In my opinion, he is one of the worst lecturers I have had at UCLA. The only people that succeed in this class are those who have nothing better to do than study for Math 31B, and even then, they struggle. I cannot emphasize this enough: If you care about your GPA, stay away from this guy!

What idiot would take this guy twice??? Oh wait, I think I know the answer to that question.

This professor does not care about his students. I think he actually tries to make students cry during the exams by making them so abstract from the material covered in class. As a person who is normally fantastic at math, I was so frustrated being presented with easy problems in class and then faced with problems that verged on not even being real math during the exams. The man is actually evil and I do not recommend his class to anyone. I wish I had something good to say, but I'm pretty sure he prays for his students failure which was especially evident when he burst into laughter when a student passed out during the final and got carried out by EMTs. It was dehumanizing to take this class and it should honestly be considered a form of cruel and unusual punishment.