ns2.fumi.com has no CNAME records.
Question and response
Question
dig ns2.fumi.com. NS
Answer
The response has no answer records.
Authority
fumi.com. 65 SOA ns3.dnsv2.com. level3dnsadmin.dnspod.com. 1754018495 3600 180 1209600 180
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0