Apex domains cannot have CNAME records.
Question and response
Question
dig fenhuanet.com. NS
Answer
fenhuanet.com. 3 NS ns1.fenhuanet.com.
fenhuanet.com. 3 NS ns2.fenhuanet.com.
Authority
The response has no authority records.
Additional
ns1.fenhuanet.com. 3 A 158.69.153.79
ns2.fenhuanet.com. 3 A 66.70.130.139
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0