mydbxf.cn.		30 IN SOA ns1.nowcndns.com. admin.nowcndns.com. (
				1751342907 ; serial
				3600       ; refresh (1 hour)
				300        ; retry (5 minutes)
				1209600    ; expire (2 weeks)
				1800       ; minimum (30 minutes)
				)

mydbxf.cn.		30 IN A	156.224.135.20

Name servers:
mydbxf.cn.		30 IN NS ns1.nowcndns.com.
mydbxf.cn.		30 IN NS ns2.nowcndns.com.