Aerial view of Daqing, northeast China's Heilongjiang (9)

Aerial photo taken on May 25, 2021 shows the memorial to "Iron Man" Wang Jinxi, an oil worker who devoted his life to the development of the petroleum industry, in Daqing, northeast China's Heilongjiang Province. China's Daqing Oilfield announced on Aug. 25 the discovery of a major shale oil field with predicted geological reserves of about 1.27 billion tonnes. Discovered in 1959, Daqing Oilfield has made a significant contribution to China's modern petroleum industry system. It also steps up efforts to improve its ecological environment in recent years. (Xinhua/Wang Jianwei)