cjlu.edu.cn                    has IPv4  has IPv6  ::1  (time=0.000183)
ia.ac.cn                       has IPv4  has IPv6  ::1  (time=0.000091)
www.uc.cn                      has IPv4  has IPv6  ::  (time=0.014182)
www.ucweb.com                  has IPv4  has IPv6  ::  (time=0.000131)