Really not worth putting yourself through all of this. Much better to take another professor with a less convenient time slot or simply wait for another quarter with better proferssors.

A splendid young chap. He taught me how to write in shakespearean (proof by recursion)
But then strikes the mystery TA, who gave us secret potions (Series Tests)
PS. On the final day Xiong finally takes off his glasses and reveals that he has an evil twin named (REDACTED) who writes the final.

Avoid this professor, take anyone else. In lectures he repeats what the textbook says and talks really slowly. I had to watch recorded lectures in 1.75 X speed to understand. He doesn’t explain how topics connect to each other or why it works. His practice tests don’t reflect what will be on the exam. I studied for hours for each test and still didn’t do well. I asked him what I could do to study better and he told me that if I had actually redone homework problems I would have done better. When I told him that I did fully redo homework problems to study (in an email) he never responded. Before our final he laughed about how easy this test should be but the average was a 62. Don’t take this professor or you will have to spend hours outside of class teaching yourself the entire course.

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.

Do anything you possibly can to avoid Xiong. Everything is self-study and the midterm average is a C. It is not worth the stress.

His lectures are not always super easy to understand, but he records and uploads all lectures and slides to Bruinlearn so class isn't mandatory at all. His midterms were easier than his final, but it was doable. Overall, I thought his class and grading was pretty fair. He curved overall grades at the end.

Haoren was not helpful when it came to understanding content. Most of the material you will have to learn on your own with little to no clarification from Xiong. His lectures often over complicate rather easy concepts, compared to an outside source, such as a YouTube video, might explain the topic. Midterms were nothing similar to the practice and often focus on smaller concepts not focused on in lecture. Both Midterms had a class average barely over 70%, with most people finding the same struggles. However, the work load was not too overwhelming, with about 10 homework problems a week. I would not recommend Xiong as a 31B professor unless you are ready to spend lots of hours teaching yourself.

I would not really recommend taking this class if you didn’t take AP Calc BC in high school. Xiong’s way of teaching doesn’t really help if you don’t already have a background in Calc 2. He hardly does any examples during his lessons and when he does he leaves them unfinished for you to “do them on your own time”. His monotone voice also doesn’t help very much so I would suggest sitting at or near the front if you want any chance of understanding him. His exams are very hard and his exams often have a very low average score. Wouldn’t recommend taking this class.

Honestly this class isn't terrible, you just have to do a lot of legwork. It's pretty hard to understand the professor during lectures because he has a monotone voice and does not explain little things like how he got from step 1 to step 2, which led me to a lot of confusion later on. If you try hard to absorb as much material as you can during lecture and then watch youtube videos on the subject from Steve Crow or The Organic Chemistry Tutor you will be fine. This class is not impossible and the amount of homework given is very reasonable (around 12-15 questions per week or even over a week), just make sure to independently watch videos on the content and do a lot of practice questions to prepare for the exams.

Ding Dong Haoren Xiong. The wretch strikes again.
If you take this class please consider by intuition to schedule an IQ test to prove your not a one to one function!!!