sy023.cn.		30 IN SOA ns1.nowcndns.com. admin.nowcndns.com. (
				1772981109 ; serial
				3600       ; refresh (1 hour)
				300        ; retry (5 minutes)
				1209600    ; expire (2 weeks)
				1800       ; minimum (30 minutes)
				)

sy023.cn.		30 IN A	38.238.187.54

Name servers:
sy023.cn.		30 IN NS ns1.nowcndns.com.
sy023.cn.		30 IN NS ns2.nowcndns.com.