ctys.com.cn.		30 IN SOA ns1.everdns.com. admin.everdns.com. (
				1579655941 ; serial
				7200       ; refresh (2 hours)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				1800       ; minimum (30 minutes)
				)

ctys.com.cn.		30 IN A	47.99.57.21

Name servers:
ctys.com.cn.		30 IN NS ns1.everdns.com.
ctys.com.cn.		30 IN NS ns2.everdns.com.