0731zc.cn.		30 IN SOA cotangent.dnspod.net. freednsadmin.dnspod.com. (
				1722025573 ; serial
				3600       ; refresh (1 hour)
				180        ; retry (3 minutes)
				1209600    ; expire (2 weeks)
				180        ; minimum (3 minutes)
				)

Name servers:
0731zc.cn.		30 IN NS group.dnspod.net.
0731zc.cn.		30 IN NS cotangent.dnspod.net.