![Chinese students wrap their arms around their waist and touch their belly- buttons to attempt a "Belly-button challenge" at a school in Luoyang city, c Stock Photo - Alamy Chinese students wrap their arms around their waist and touch their belly- buttons to attempt a "Belly-button challenge" at a school in Luoyang city, c Stock Photo - Alamy](https://c8.alamy.com/comp/W8EXW2/chinese-students-wrap-their-arms-around-their-waist-and-touch-their-belly-buttons-to-attempt-a-belly-button-challenge-at-a-school-in-luoyang-city-c-W8EXW2.jpg)
Chinese students wrap their arms around their waist and touch their belly- buttons to attempt a "Belly-button challenge" at a school in Luoyang city, c Stock Photo - Alamy
![A Chinese student wraps her arm around her waist and touches her belly- button to attempt a "Belly-button challenge" at a school in Luoyang city, centr Stock Photo - Alamy A Chinese student wraps her arm around her waist and touches her belly- button to attempt a "Belly-button challenge" at a school in Luoyang city, centr Stock Photo - Alamy](https://c8.alamy.com/comp/W8J451/a-chinese-student-wraps-her-arm-around-her-waist-and-touches-her-belly-button-to-attempt-a-belly-button-challenge-at-a-school-in-luoyang-city-centr-W8J451.jpg)
A Chinese student wraps her arm around her waist and touches her belly- button to attempt a "Belly-button challenge" at a school in Luoyang city, centr Stock Photo - Alamy
![Chinese 'bellybutton challenge': Why are people posting pictures reaching behind their backs on social media? | The Independent | The Independent Chinese 'bellybutton challenge': Why are people posting pictures reaching behind their backs on social media? | The Independent | The Independent](https://static.independent.co.uk/s3fs-public/thumbnails/image/2015/06/12/10/bellybutton4.jpg?width=1200)