The Bo Hai, also known as the Gulf of Bohai, is a semi-enclosed sea located in northern China. It is bordered by the provinces of Liaoning, Hebei, and Shandong, as well as the city of Tianjin. The gulf connects to the Yellow Sea to the east and plays a significant role in the region's economy, particularly in fishing and shipping. The Bo Hai is relatively shallow, with an average depth of about 18 meters. It is home to various marine species and supports important fisheries. Additionally, the gulf is a vital area for oil and gas exploration, contributing to China's energy resources and economic development.