Decent lectures, though at times unorganized. Zhang was very kind, but at times he seemed annoyed at students' questions. Both his homework and exams were straightforward.

After nearly a year, I came to check in again, hoping that Siegel can complete the zero point as soon as possible. .

Professor is very intelligent so sometimes he goes faster than he realizes so that can make him hard to follow. exams and hw are very rigorous but he offers help in lecture so go to lecture!! overall fair course but study your class notes because homework and exams are a much trickier version of the notes. overall amazing professor! kind & caring

I visited this website a few years ago, and I also read Teacher Zhang's documentary and sister's article, and I read it again today. After a years-long hiatus, Zhang published his Landau-Siegel Zeros paper today. Hope he succeeds again and becomes a legendary mathematician! Blessings from Shaoxing, China. Quoting Du Fu's poem again...