Photo taken on Dec. 12, 2021 shows the morning view of Jidong Oilfield in north China's Hebei Province. Since entering winter, workers at Jidong Oilfield have overcome the unfavorable factors of winter production and strengthened daily inspection to ensure the completion of annual production targets. (Photo by Liu Mancang/Xinhua)
Aerial photo taken on Dec. 12, 2021 shows workers inspecting an oil well at Jidong Oilfield in north China's Hebei Province. Since entering winter, workers at Jidong Oilfield have overcome the unfavorable factors of winter production and strengthened daily inspection to ensure the completion of annual production targets. (Photo by Liu Mancang/Xinhua)
Photo taken on Dec. 12, 2021 shows the morning view of Jidong Oilfield in north China's Hebei Province. Since entering winter, workers at Jidong Oilfield have overcome the unfavorable factors of winter production and strengthened daily inspection to ensure the completion of annual production targets. (Photo by Liu Mancang/Xinhua)
Workers inspect an oil well at Jidong Oilfield in north China's Hebei Province, Dec. 12, 2021. Since entering winter, workers at Jidong Oilfield have overcome the unfavorable factors of winter production and strengthened daily inspection to ensure the completion of annual production targets. (Photo by Liu Mancang/Xinhua)
