My subdomain don't work

I have add my subdomain, but it not work.
Please help me check

What’s the hostname that’s not working?

my hostname: sanpham.yenvietbinhphuoc.com

Vào Th 4, 11 thg 9, 2019 vào lúc 20:08 sdayman via Cloudflare Community [email protected] đã viết:

There is no DNS entry for that subdomain. If you add that subdomain at your host, you still need to add it to DNS here at Cloudflare. It would be another “A” or “CNAME” record, like your main domain.

Can you show me example picture?
Thanks

Vào Th 6, 13 thg 9, 2019 vào lúc 20:35 sdayman via Cloudflare Community [email protected] đã viết: