https://www.nature.com/nature-index/news/nature-index-resear...

¯\_(ツ)_/¯

Edit: Oh, that's old. In 2024 Chinese institutions only made up 7 of the top 10 most productive research centers but in 2025 they are account for 8/10: https://www.natureasia.com/en/info/press-releases/detail/911...