Aerial photo taken on Sept. 29, 2019 shows pupils laying flowers at a revolutionary martyrs' cemetery in Handan, north China's Hebei Province. Pupils from Nan Guan primary school of Hanshan District in Handan visited a revolutionary martyrs' cemetery on Sunday to commemorate deceased martyrs and heroes before the Martyrs' Day, which falls on Sept. 30. (Xinhua/Wang Xiao)