Recently, Liu Yifei attended an endorsement event for a brand. Due to the looseness of her dress, she accidentally exposed her white bra. Such indecent exposure incidents involving celebrities have been frequently occurring in the entertainment circle. A moment's carelessness on the part of a star can result in merciless documentation by reporters' flashlights, and then overwhelming reports begin to appear on major websites and newspapers. Editor's comment: If a piece of clothing is too loose, one must adjust its size before wearing it to avoid accidental exposure. In the case of Liu Yifei, not only was her dress ill-fitting, but also her sitting posture was very ungraceful, which led to the indecent exposure incident. When wearing low-cut outfits, one should sit elegantly and uprightly, which can not only display good temperament but also prevent indecent exposure.