China's universities just took 6 of top 10 spots in a worldwide science ranking

"We produce the Leiden Ranking for policy makers, research managers, researchers, journalists, and anyone else with an interest in the scientific performance of universities. The Leiden Ranking does not consider the performance of universities in terms of teaching. We therefore expect the information provided by the Leiden Ranking to be of little value for students, and we advise students not to use the Leiden Ranking to choose where to study."

https://www.leidenranking.com/information/general

Interesting is that there is no Chinese universities in top 10 in ranking created by Shanghai university..

> Traditional rankings, like those done by ShanghaiRanking, use researchers' publications in a curated group of elite academic journals to create a list of the "best" and most prestigious universities. Switching to include a much larger group of open-access journal publications results in a very different Top 20.

> The open-access services often include content from potential paper mills, businesses manufacturing what look like scholarly manuscripts for sale. Despite concerns about the reputation and editorial practices of these publishers and editors, there’s little oversight. These services are flooding the publishing world with vast numbers of lower-quality articles.

Uh... Ok. Yes, it's indeed true that rankings will be different if you stop caring about things like quality control. This is not news.