Question on CDN configuration

I try to configure Cloudflare CDN.

Origin contents are in the AliCloud OSS(Object Store Service), and I specified the bucket domain name of the AliCloud OSS as a Target value.

After more than 10 mins, I tried to access a file which exists in the AliCloud OSS using Cloudflare CDN, but it does not work properly. See the pic please.

How can I make it work?