nsbu.cn.		30 IN SOA now1.dns.com. admin.dns.com. (
				1724915690 ; serial
				7200       ; refresh (2 hours)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				1800       ; minimum (30 minutes)
				)

nsbu.cn.		30 IN A	38.33.58.45

Name servers:
nsbu.cn.		30 IN NS now1.dns.com.
nsbu.cn.		30 IN NS now2.dns.com.