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

Police officers attend a learning session on the deeds of revolutionary martyrs in Shijiazhuang, north China's Hebei Province, 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/Yang Shiyao)