bigdata.ac.cn.		30 IN SOA ns1.ddoss-waf.com. zeus.bb2.com. (
				1773223023 ; serial
				7200       ; refresh (2 hours)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				3600       ; minimum (1 hour)
				)

Name servers:
bigdata.ac.cn.		30 IN NS ns1.ddoss-waf.com.
bigdata.ac.cn.		30 IN NS ns2.ddoss-waf.com.