Hi @unihope_sh,
Thanks for writing in to let us know about this issue. Try @Mike_O_Neill’s suggestion. If that doesn’t work you may want to take a look at this conversation Is Roon banned in China? - #10 by Krutsch. It’s a bit old but it looks like what VPNs work in China can change over time. So while I cannot officially endorse using a VPN with Roon it might be something to look at.