Dongying, a prefecture-level city, lies on the northern coast of Shandong province, People's Republic of China. As of the 2020 census, 2,193,518 people resided within its administrative area of 7,923.26 km2 (3,059.19 sq mi) and 1,188,656 in the built-up area made up of Dongying and Kenli districts. Dongying is home to the Shengli Oilfield, which after the Daqing oilfield is the second largest oilfield in China.

The Bohai Sea is a gulf/inland sea approximately 77,000 km2 (30,000 sq mi) in area on the east coast of Mainland China. It is the northwestern and innermost extension of the Yellow Sea, to which it connects to the east via the Bohai Strait. It has a mean depth of approximately 18 meters (59 ft), with a maximum depth of about 80 meters (260 ft) located in the northern part of the Bohai Strait.