Russian Calculus Course, and then got full marks in the exam. If you can understand a textbook, you don't have to read it. In fact, it means that there is something wrong with this textbook. The biggest problem with this textbook is whether it is high or not, but it is clever but has no advantages. As far as popularity is concerned, it is not as friendly as Thomas Calculus, nor as thick as Fickin Goelz's in science and engineering, not to mention Rudin and zorich, the "classic" courses in the Department of Mathematics.

Compared with Russian mathematics research field, China is far behind. Of course, Russian mathematics is not only better than China's, but also known as a mathematical superpower and a veritable mathematical power.