Yesterday, former Google-executive Hugo Barra, now Xiaomi's global vice president, had a talk with The Verge.
Barra is only a year into his job as leader of Mi's internationalization efforts, but he's already "sick and tired" of hearing his company derided as an Apple copycat. He sees Mi as "an incredibly innovative company" that never stops trying to improve and refine its designs, and the allegations of it copying Apple are "sweeping sensationalist statements because they have nothing better to talk about."
Scroll down on the Mi 3 "features" page and you'll see this image, named "detail-camera.jpg". Take a good look at the camera in that image, then look at the app icon for the current version of Aperture. It's a simple copy-paste-skew job of the lens, and not a very good one. Two panels down on the page, they use it again, horizontally flipped. (Shockingly, they cropped out the "Designed by Apple in California".)