Apex domains cannot have CNAME records.
Question and response
Question
dig prosper.com.cn. NS
Answer
prosper.com.cn. 5 NS dns10.hichina.com.
prosper.com.cn. 5 NS dns9.hichina.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0