Apex domains cannot have CNAME records.
Question and response
Question
dig jxcn.cn. NS
Answer
jxcn.cn. 4 NS dns7.hichina.com.
jxcn.cn. 4 NS dns8.hichina.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0