这个段现在好像不行了
我记得刚出来ping包都50ms，现在比美国的还慢
C:\>ping 50.31.252.1
Pinging 50.31.252.1 with 32 bytes of data:
Reply from 50.31.252.1: bytes=32 time=360ms TTL=234
Reply from 50.31.252.1: bytes=32 time=347ms TTL=234
Reply from 50.31.252.1: bytes=32 time=335ms TTL=234
Reply from 50.31.252.1: bytes=32 time=431ms TTL=234
Ping statistics for 50.31.252.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 335ms, Maximum = 431ms, Average = 368ms
