Internet memes can start anywhere and spread everywhere: That's exactly what makes them so wonderful.
But there has been a wave of disturbing body-shaming memes recently, and they all originate in the same place: Chinese social networks, such as Renren and Weibo.
There was the A4 Challenge, a call to prove one's waist was narrower than a standard sheet of A4 paper. The iPhone 6 knee, featuring photographs of young women's legs hidden by the 15cm screen. The underboob pen challenge, in which women hold writing utensils in the fold beneath their breasts. The belly button and collarbone challenges, both geared toward demonstrating the challenger's thinness.
The latest viral fad, called the 100 Yuan Challenge, involves photographing yourself as you wrap the 15cm bill around your wrist. There hasn't been a spate of body memes this bad since the era of the bikini bridge.
Like that meme, which originated in the United States, this latest batch has an obvious goal: to promote a body image that, for most women, is neither healthy nor attainable. But when we asked Marcella Szablewicz, a professor and researcher at Pace University who studies Chinese internet culture, she had a secondary theory: Perhaps the popularity of these memes is fuelled, to some extent, by class divides in the Chinese economy.