Hi @Ryan_Yu,
Thanks for taking the time to write in! Unfortunately, based on your status, and if no upstream services are reliable, you may need to try a different proxy service or VPN.
Roon however isn’t equipped to provide guidance on how to bypass state firewall restrictions, but users have gathered useful anecdotes in threads like this: Is Roon banned in China?
I hope this may help as it falls outside the scope of support.