On Wed, May 13, 2009 at 03:37:19PM +0800, Tech W. <techwww at yahoo.com.cn> wrote a message of 39 lines which said: > if I understand for it correctly, gdpu.cn is not under b.dns.cn, True, but irrelevant. > why b.dns.cn returns glues? Because the name servers of gdpu.cn are under gdpu.cn.