smartthinking.cn.	30 IN SOA dns9.hichina.com. hostmaster.hichina.com. (
				2024120409 ; serial
				3600       ; refresh (1 hour)
				1200       ; retry (20 minutes)
				86400      ; expire (1 day)
				600        ; minimum (10 minutes)
				)

smartthinking.cn.	30 IN TXT "v=spf1 include:spf.163.com ~all"

Mail exchangers:
smartthinking.cn.	30 IN MX 10 mx.ym.163.com.

Name servers:
smartthinking.cn.	30 IN NS dns9.hichina.com.
smartthinking.cn.	30 IN NS dns10.hichina.com.