1. For non-special needs, there is no need to set up additional hosts on this site. If there are problems related to inaccessibility, please go to the connectivity problem feedback post

. All users who have used 198.251.84.91 as hosts should delete the hosts as soon as possible. The use of this ip has been terminated.

2. From 202307.01 onwards, all visits to https://www.hdchina.org will be redirected to https://hdchina.org by default , and the cookies of users using the former domain name will be invalid.

3. The HDChina working group is continuously recruiting, see