The latest social media "beauty trend" in China is making sure your knees are able to be covered by your iPhone 6. Apparently this proves that you're "skinny" enough?
It's pretty common on Chinese social media for "proof of beauty" memes to cycle around. Others have included putting coins in your collarbone, holding a pen under your breast and more recently, making sure your waist is completely hidden behind an A4 sized piece of paper. These are a lot of standards to meet for one person... now apparently your kneecaps need to be small too?