4sec.cn.		30 IN SOA ns17.xincache.com. enterprise1dnsadmin.dnspod.com. (
				1576619089 ; serial
				3600       ; refresh (1 hour)
				180        ; retry (3 minutes)
				1209600    ; expire (2 weeks)
				180        ; minimum (3 minutes)
				)

4sec.cn.		30 IN A	112.121.182.5

Mail exchangers:
4sec.cn.		30 IN MX 5 mxbiz1.qq.com.
4sec.cn.		30 IN MX 10 mxbiz2.qq.com.

Name servers:
4sec.cn.		30 IN NS ns18.xincache.com.
4sec.cn.		30 IN NS ns17.xincache.com.