Chinese President Xi Jinping (C, front), also general secretary of the Central Committee of the Communist Party of China and chairman of the Central Military Commission, steps onto the stage and sings in chorus the song "Ode to the Motherland" with the performers and the audience during a grand gala marking the 20th anniversary of Hong Kong's return to China at Hong Kong Convention and Exhibition Center, in Hong Kong, south China, June 30, 2017. (Xinhua/Ma Zhancheng)
