How to display inline image in Emacs

Question

I have tried M-x org-toggle-limage-in-org, org-display-inline-images,iimage-mode. However, all these cannot display my images. See attached screen shot. I have added the (autoload 'iimage-mode "iimage" "Support Inline image minor mode." t) (autoload 'turn-on-iimage-mode "iimage" "Turn on Inline image minor mode." t) in my init.el.

Maybe because Emacs needs something to show the images?

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Thank you so much for your help!