Yin Haihong, charge d'Affaires of the Chinese embassy in Vietnam, delivers a speech at the Xuan Mai Martyrs Cemetery in Hanoi, Vietnam, on April 4, 2018. Representatives of the Chinese embassy in Vietnam, Chinese enterprises, students and the media, accompanied by local officials, on Wednesday held a memorial ceremony in the cemetery where 10 Chinese martyrs were buried, on the occasion of Tomb Sweeping Day, or Qingming Festival. (Xinhua/Wang Di)