The IP address this site is resolving to has already been traced to a host in South China in message #:3800512 above.
but for it's sub-domain name,it need not to have a icp registration.
By that same argument www is a subdomain as well. A subdomain is a treated as a separate website by most search engines. I'll bet the people controlling the ICP registrations are savvy enough to recognize that. If it were that easy to get around ICP registration, and the registration is not as popular as you say, then everyone could avoid compliance by using subdomains?
Are there sections in the regulations that deal with this sort of case, or are they simply negligent as redstorm suggested?