Nice professor. Contents are well–organized and explanation are clear.

He is always caring for students and willing to help them. Exams are somewhat difficult but he offers bonus points as long as you would like to put efforts.

His low reviews are just people who have low grades. Yes his exams are difficult and he actually grades your homework on accuracy but you get what you put into the class. Prof Zhou is amazing and I would take his class if the opportunity ever arises again.

It was a really hard class for me, but Professor Zhou explained the difficult concepts really well and was very fair with grading. He's also super kind, so students feel comfortable asking questions. Tough class, but an awesome professor!

Zhou teaches SOOO slowly and spends entire lectures on review, but doesn't cover the material he's supposed to. I only took 6B for the PDEs, which he didn't even get CLOSE to going over by the end >:( He does give a lot of extra credit, so if you want an A or are shaky on basic vector calc, he's fine-- but if you want rigor, look elsewhere.

Really wish to continue the series taught by Prof. Zhou. Seems he is not teaching this quarter. He is my GOAT.