set up cloudflare.f-droid.org with sponsored account from Cloudflare's Project Galileo
Cloudflare's CDN is globally available, including in mainland China, and is generally quite fast. @proletarius101 has been working on getting sponsorship #229 from them so we can use their services without cost. At the very least, having a mirror there would make sense. Fully hosting f-droid.org there would not since they captcha/block connections over Tor unless they are coming from Tor Browser. It could make sense to have a multi-CDN setup with f-droid.org pointing to Cloudflare for countries where it is clearly the best option.
They have responded to @proletarius101's request via team@f-droid.org with a request for more info:
On behalf of Cloudflare, thank you for your inquiry into becoming part of Project Galileo. Cloudflare is currently discussing your application with our partner organizations and would appreciate some additional information about your mission. Any information which you are able to provide about the not-for-profit or small commercial status of your organization and how your work intersects with the public interest would be appreciated and would help your application.
This issue is to track the progress of the Cloudflare application process.