Activities in honour of revolutionary martyrs held across China ahead of Qingming Festival

Police officers attend a mourning ceremony at Yinchuan Martyr's Cemetery in Yinchuan, northwest China's Ningxia Hui Autonomous Region, April 3, 2019. Activities in honour of revolutionary martyrs are held across China ahead of the Qingming Festival, or Tomb-sweeping Day, which falls on April 5 this year. (Xinhua/Liu Yufei)