fabw.huaxueku.com. 30 IN CNAME overdue.aliyun.com. fabw.huaxueku.com. 30 IN CNAME overdue.aliyun.com. fabw.huaxueku.com. 30 IN CNAME overdue.aliyun.com. overdue.aliyun.com. 30 IN A 170.33.12.185 fabw.huaxueku.com. 30 IN CNAME overdue.aliyun.com.