mx74.chaps.sike.com has no CNAME records.
Question and response
Question
dig mx74.chaps.sike.com. NS
Answer
The response has no answer records.
Authority
sike.com. 5961 SOA ns1.fumi.com. hostmaster.fumi.com. 2020120911 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0