Staff members of the Chinese embassy lay flower wreaths in honour of martyrs from the Chinese People's Volunteers Army at the Friendship Tower in Pyongyang, Democratic People's Republic of Korea, on April 4, 2019. Staff members from the Chinese embassy held commemorative ceremonies here on Thursday in honour of martyrs from the Chinese People's Volunteers Army ahead of China's traditional Qingming Festival, or Tomb-sweeping Day, which falls on April 5 this year. (Xinhua/Cheng Dayu)