jz21.cn.		30 IN SOA a.share-dns.com. master.share-dns.com. (
				1758292520 ; serial
				3600       ; refresh (1 hour)
				1200       ; retry (20 minutes)
				86400      ; expire (1 day)
				600        ; minimum (10 minutes)
				)

jz21.cn.		30 IN A	38.6.247.148

Name servers:
jz21.cn.		30 IN NS a.share-dns.com.
jz21.cn.		30 IN NS b.share-dns.net.