2017-04-22-----2017-04-22 sg.pool.ntp.org
2016-10-18-----2017-04-20 1.asia.pool.ntp.org
2016-01-11-----2017-01-18 asia.pool.ntp.org
2016-11-16-----2016-11-16 3.asia.pool.ntp.org
2016-11-13-----2016-11-13 0.asia.pool.ntp.org
2016-11-06-----2016-11-06 0.openwrt.pool.ntp.org
2016-10-18-----2016-10-18 2.asia.pool.ntp.org