robot-cn.net.		30 IN SOA ns1.kouming.net. root.kouming.net. (
				1758217271 ; serial
				3600       ; refresh (1 hour)
				600        ; retry (10 minutes)
				86400      ; expire (1 day)
				600        ; minimum (10 minutes)
				)

Name servers:
robot-cn.net.		30 IN NS ns2.kouming.net.
robot-cn.net.		30 IN NS ns1.kouming.net.