Dalian Bay is a bay on the southeast side of the Liaodong Peninsula of Northeast China

Northeast China

Northeast China, historically known in English as Manchuria, is a geographical region of China, consisting of the three provinces of Liaoning, Jilin and Heilongjiang. The region is sometimes called the Three Northeast Provinces...

, open to the Yellow Sea

Yellow Sea

The Yellow Sea is the name given to the northern part of the East China Sea, which is a marginal sea of the Pacific Ocean. It is located between mainland China and the Korean Peninsula. Its name comes from the sand particles from Gobi Desert sand storms that turn the surface of the water golden...

 in the east. Downtown Dalian

Dalian

Dalian is a major city and seaport in the south of Liaoning province, Northeast China. It faces Shandong to the south, the Yellow Sea to the east and the Bohai Sea to the west and south. Holding sub-provincial administrative status, Dalian is the southernmost city of Northeast China and China's...

 lies along the southern shore of the bay. Its significance is that it is ice-free year-round, while Jinzhou Bay (金州湾) on the other, northwest side of the peninsula is part of the Bohai Sea

Bohai Sea

Bohai Sea , also known as Bohai Gulf, Bohai, or Bo Hai, is the innermost gulf of the Yellow Sea on the coast of Northeastern and North China. It is approximately 78,000 km2 Bohai Sea , also known as Bohai Gulf, Bohai, or Bo Hai, is the innermost gulf of the Yellow Sea on the coast of...

, and is shallow and closed for four months of the winter.

The bay was the rendezvous point for the British fleet for the 1860 assault on China during the Second Opium War

Second Opium War

The Second Opium War, the Second Anglo-Chinese War, the Second China War, the Arrow War, or the Anglo-French expedition to China, was a war pitting the British Empire and the Second French Empire against the Qing Dynasty of China, lasting from 1856 to 1860...

.