People attend a theme event celebrating the 70th anniversary of the founding of the People's Republic of China (PRC) in front of Zhongshan Bridge in Lanzhou, northwest China's Gansu Province, Sept. 26, 2019. Various events launched by the All-China Youth Federation were held on Thursday across the country to express good wishes to Hong Kong and celebrate the 70th anniversary of PRC's founding. (Xinhua/Fan Peishen)