Performers wearing Ao Dai sing and dance during the opening ceremony of Ao Dai Festival 2018 in Ho Chi Minh City, Vietnam, on March 3, 2018. Ho Chi Minh City's Ao Dai Festival 2018 kicked off on Saturday, featuring fashion shows, parades, art performances, exhibitions and etc. It will last until March 25. (Xinhua/Hoang Thi Huong)