Plus, considering the status of these two mentors in the domestic and global mathematics community, there's no need to mention the influence of Elder Yuan, a living Fields Medal giant, in the international math scene.
While Tian Yan Zhen has always maintained close cooperation with the Academy of Sciences, and he himself is a judge for the world-renowned Abel Prize and an editorial board member of top international mathematics journals...
Qiao Yu and Qiao Xi's future along this path is something Tan Lu Yuan can hardly imagine.
Integrating the Yanbei and Huaqing schools and maintaining good relations with the Academy of Sciences, the future development of mathematics in Huaxia may indeed heavily depend on Beijing.
If you add to that professors like Lott Degen, Peter Schultz, Pierre Derini, who reportedly have good relationships with Qiao Yu...