sxbj.com.cn.		30 IN SOA ns1.72dns.com. admin.72dns.com. (
				1691666129 ; serial
				7200       ; refresh (2 hours)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				1800       ; minimum (30 minutes)
				)

Name servers:
sxbj.com.cn.		30 IN NS ns1.72dns.com.
sxbj.com.cn.		30 IN NS ns2.idc1.cn.