Gold medalist Simone Biles (C) of the United Sates, silver medalist Shallon Olsen (L) of Canada and bronze medalist Alexa Moreno of Mexico pose on the podium during the medal ceremony of women's vault final at the 2018 FIG Artistic Gymnastics World Championships in Doha, capital of Qatar, Nov. 2, 2018. (Xinhua/Nikku)