How to make resources on another site being cached by Cloudflare?


I have a website that is cached by Cloudflare.

In the page, it put two resources:


Based on my test, only a.jpg is cached by Cloudflare, b.jpg is not cached. Is there a way to make b.jpg be cached as well, without having added to Cloudflare?

In a word: No.

In more words: move b.jpg to the domain that is using Cloudflare.