Workers overcome unfavorable factors to meet annual production targets in Jidong Oilfield (4)

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)