It all started three years ago when Qian Zhijun, then 16, was attending a traffic safety class and someone snapped a picture of his rotund, rosy-cheeked face.

• 一切都要追溯到三年前十六岁的钱志君参加交通安全讲习课程时，有人拍了张他圆嘟嘟的红脸颊照片。