cmu.edu.cn has IPv4 has IPv6 ::1 (time=0.000122) ecust.edu.cn has IPv4 has IPv6 ::1 (time=0.000167) edu22.info has IPv4 has IPv6 ::1 (time=0.000547) ia.ac.cn has IPv4 has IPv6 ::1 (time=0.000151) www.uc.cn has IPv4 has IPv6 :: (time=0.000119) www.ucweb.com has IPv4 has IPv6 :: (time=0.000088)