Looks like a fan made concept.. But might be true.. Xiaomi doesn't have anything to compete against MX4 Pro yet..
If this is true it's basically Xiaomi admitting they royally f'ed up with the Mi4 (I won't get into details).
On another note, I'm also sure they want to launch the Mi5 so they can start selling the Mi4 in India. yuk-yuk-yuk! :-P