Hi @Depei_Wang,
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.
Roon and Tidal are not banned in China. However the connection speed may not be as fast as the domestic website. I can long on Tidal account without any problem through Tidal APP or website without VPN. I don’t understand why Roon can’t log on to Tidal especially the Tidal website already shows long on successfully.