Looks like #TheHugoAwards controversy has some new details: https://file770.com/the-2023-hugo-awards-a-report-on-censorship-and-exclusion/
TLDR is the North American members of WorldCon on their own recognizance were judging nominees as ineligible rather than at the request of the Chinese government.
The 2023 Hugo Awards: A Report on Censorship and Exclusion - File 770
This report is being released simultaneously on File770 and Genre Grapevine and is also available to download as an e-book epub file and as a PDF. By Chris M. Barkley and Jason Sanford “You acquire information and you convey the information. That’s the job.” ++ National Public Radio News Director, Editor and Reporter Emeritus Linda