Nguyen Vinh Quang, vice chairman of Vietnam-China Friendship Association, offers incenses to Chinese martyrs at a cemetery in Vietnam's northern province of Thai Nguyen, April 4, 2019. Here in a cemetery in Linh Son commune, Thai Nguyen city, Thai Nguyen province, about 80 km from downtown Hanoi, Vietnam, 139 Chinese martyrs lay resting in eternal peace. (Xinhua/Wang Di)