People pose for a group photo during a theme event celebrating the 70th anniversary of the founding of the People's Republic of China (PRC) at a square in Changchun, northeast China's Jilin 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/Zhang Nan)