This photo taken on Dec. 21, 2025 shows the offshore oil and gas platforms in Bohai Oilfield. China's largest offshore oilfield, the Bohai Oilfield, has produced over 40 million tonnes of oil equivalent in 2025, setting a historical record, the China National Offshore Oil Corporation (CNOOC) announced Sunday. The Bohai Oilfield, which currently operates more than 60 producing oil and gas fields, has yielded a cumulative crude oil output exceeding 600 million tonnes. Over the past five years, its oil and gas production has grown by 5 percent annually, according to CNOOC. (Photo by Du Penghui/Xinhua)

An aerial drone photo taken on Dec. 21, 2025 shows the offshore oil and gas platforms in Bohai Oilfield.(Photo by Du Penghui/Xinhua)

An aerial drone photo taken on Dec. 21, 2025 shows the offshore oil and gas platforms in Bohai Oilfield.(Photo by Du Penghui/Xinhua)

An aerial drone photo taken on Dec. 21, 2025 shows the offshore oil and gas platforms in Bohai Oilfield.(Photo by Du Penghui/Xinhua)

An aerial drone photo taken on Dec. 21, 2025 shows the offshore oil and gas platforms in Bohai Oilfield.(Photo by Du Penghui/Xinhua)