http://ysshlyesehcnscptskrpai4iupxccuvfcpbxk37kclbs3rsaqmolzaid.onion/links.html
China is using their "Great Firewall" for that purpose (they target Tor bridges that way for example [x] ), and you would have to be a braindead zombie to not expect all other countries as well. How would you go about to trace that, as an attacked foreigner?