uchao.net.		30 IN SOA uchao.net. uchao.net. (
				53         ; serial
				36000      ; refresh (10 hours)
				600        ; retry (10 minutes)
				86400      ; expire (1 day)
				3600       ; minimum (1 hour)
				)

uchao.net.		30 IN A	39.98.172.156

Mail exchangers:
uchao.net.		30 IN MX 5 mxbiz1.qq.com.
uchao.net.		30 IN MX 10 mxbiz2.qq.com.