An A4 piece of paper measures 21 centimeters in width and 29.7 centimeters in length. The latest trend on Chinese social media has prompted thousands of women to try another hot figure test. "Cover your waist with an A4 sheet of paper vertically to show how slim you are" is the latest hashtag to show off your body. Many women and men have posted photos of themselves doing so on social media although many of them said they can only cover the waist with an A4 sheet of paper horizontally.(Photo/Weobo)

Chinese speed skating player Zhang Hong performs touching her belly button with her hand from around the back. (Photo/sina weibo)

People show off their good figures in a park in southwest China's Chongqing last week. Some touched the bellybutton around the waist, some put coins or small gold fishes on the clavicle, which are the latest trend on Chinese social media for people to show off good figure. (Photo/CNS)