web321.cn.		600 IN SOA jm1.dns.com. admin.dns.com. (
				1661850840 ; serial
				7200       ; refresh (2 hours)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				1800       ; minimum (30 minutes)
				)

web321.cn.		600 IN A 154.23.146.182

Name servers:
web321.cn.		21600 IN NS jm1.dns.com.
web321.cn.		21600 IN NS jm2.dns.com.