Apex domains cannot have CNAME records.
Question and response
Question
dig yinghaiwangluo.com. NS
Answer
yinghaiwangluo.com. 5 NS ns-83.awsdns-10.com.
yinghaiwangluo.com. 5 NS ns-79.awsdns-09.com.
yinghaiwangluo.com. 5 NS ns-1392.awsdns-46.org.
yinghaiwangluo.com. 5 NS ns-1098.awsdns-09.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0