jiandao.com.cn.		30 IN SOA ns1.sfn.cn. root.ns1.sfn.cn. (
				2024042518 ; serial
				600        ; refresh (10 minutes)
				120        ; retry (2 minutes)
				604800     ; expire (1 week)
				7200       ; minimum (2 hours)
				)

jiandao.com.cn.		30 IN A	182.92.179.197

Mail exchangers:
jiandao.com.cn.		30 IN MX 10 218.244.143.21.

Name servers:
jiandao.com.cn.		30 IN NS ns1.sfn.cn.
jiandao.com.cn.		30 IN NS ns2.sfn.cn.