Perhaps relevant to this - if you go to this global ranking of publications:

  https://traditional.leidenranking.com/ranking/2025/list

My Chinese colleagues have heard of it, but never considered it a top-ranked school, and a quick inspection of their CS faculty pages shows a distinct lack of PhDs from top-ranked Chinese or US schools. It's possible their math faculty is amazing, but I think it's more likely that something underhanded is going on...