We can insert photos in the post. How? just upload the photo to a website then put the url into the post.
Wait a second, I find a bug.
Here is the true photo
the url is [feelapi.com/steemtest/true.png]
Then I replace it on the server because I can! Let me show you.
This is the test url's photo.
At first, it's the same as the first photo. Now it's 10:36pm Beijing time. I will change it to anther photo on 10:45pm Beijing time. You will see.
As you know, it's 10:43 Beijing time now. I failed. I changed the photo on the url. But I can not fake the photo in this post.
Why?
Because the photo was stored on the img1.steemit.com. Now I know it.
Here is the my new test.png:
After I changed the url, it shows the right version. So the image was indexed on the img1.steemit.com by it's url.