Apex domains cannot have CNAME records.
Question and response
Question
dig avature.cn. NS
Answer
avature.cn. 2 NS ns-2773.awsdns-cn-45.biz.
avature.cn. 2 NS ns-intl-472.awsdns-cn-29.com.
avature.cn. 2 NS ns-1154.awsdns-cn-08.net.
avature.cn. 2 NS ns-intl-3926.awsdns-cn-53.cn.
avature.cn. 2 NS ns-472.awsdns-cn-29.com.
avature.cn. 2 NS ns-3926.awsdns-cn-53.cn.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0