Apex domains cannot have CNAME records.
Question and response
Question
dig tinp.net.tw. NS
Answer
tinp.net.tw. 3 NS dns.tinp.net.tw.
tinp.net.tw. 3 NS ns.tinp.net.tw.
Authority
The response has no authority records.
Additional
ns.tinp.net.tw. 3 A 61.60.224.3
dns.tinp.net.tw. 3 A 61.60.224.5
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0