zzsky.cn.		30 IN SOA firefly.dnspod.net. freednsadmin.dnspod.com. (
				1689210814 ; serial
				3600       ; refresh (1 hour)
				180        ; retry (3 minutes)
				1209600    ; expire (2 weeks)
				180        ; minimum (3 minutes)
				)

Name servers:
zzsky.cn.		30 IN NS rainbow.dnspod.net.
zzsky.cn.		30 IN NS firefly.dnspod.net.