Apex domains cannot have CNAME records.
Question and response
Question
dig innopro.com.tw. NS
Answer
innopro.com.tw. 4 NS ns23.domaincontrol.com.
innopro.com.tw. 4 NS ns24.domaincontrol.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0