In 2002, Sichuan University was the only one among the three universities to obtain two national-level disciplines, namely, basic mathematics and applied mathematics, while Zhongshan University and Wuhan University each had only 1. Since 2007, only Sichuan University has obtained the national first-class key discipline of mathematics (only the Mathematics Department of Sichuan University has obtained the universities in Central China, West China and South China).
There are two full-time academicians Liu Yingming and Li Anmin in the Department of Mathematics of Sichuan University, ranking among the top three universities in China, while there are no full-time academicians in the Department of Mathematics of Wuhan University and Zhongshan University. In terms of scientific research (such as the four top mathematics magazines) and personnel training (such as academicians and spokespersons of Mathematicians University), the Department of Mathematics of Sichuan University is first-class in China, ahead of the other two universities.
In short, if you want to learn mathematics, Sichuan University is the first of the three. But Wu Da and Zhongshan are also good at math.