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

Arm around waist hi-res stock photography and images - Alamy

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Arms around waist hi-res stock photography and images - Alamy

Chinese 'bellybutton challenge': Why are people posting pictures reaching behind their backs on social media?, The Independent

Chinese Student Wraps Her Arm Her Waist Touches Her Belly – Stock Editorial Photo © ChinaImages #240901766

Arms around waist hi-res stock photography and images - Alamy

Belly chinese hi-res stock photography and images - Page 6 - Alamy

One girl tries her hand at the belly button challenge

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

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