e-grains.cn.		30 IN SOA f1g1ns1.dnspod.net. freednsadmin.dnspod.com. (
				1451351320 ; serial
				3600       ; refresh (1 hour)
				180        ; retry (3 minutes)
				1209600    ; expire (2 weeks)
				180        ; minimum (3 minutes)
				)

Name servers:
e-grains.cn.		30 IN NS f1g1ns2.dnspod.net.
e-grains.cn.		30 IN NS f1g1ns1.dnspod.net.