Google Translate:

The old tracker domain name tracker.hdchina.club is temporarily disabled at a later time due to the need for site domain name change arrangements. Ask all members who do not switch the tracker domain to switch the tracker address as soon as possible
https://tracker.hdchina.org/announce.php?passkey= your passkey
or
http://tracker.hdchina.org/announce.php?passkey= your passkey
To continue the normal use of site services.
If you have any questions, please post here.

==== HDChina Management Group ====

Our old tracker domain tracker.hdchina.club has shut down. Please update your tracker address to
https://tracker.hdchina.org/announce.php?passkey=[YOUR PASSKEY]
or
http://tracker.hdchina.org/announce.php?passkey=[YOUR PASSKEY]

==== HDChina Staff ====