Weihai is a city in eastern Shandong Province, People's Republic of China. It is the easternmost prefecture-level city of the Province and a major seaport. Between 1898 and 1930, the town was a British colony known as Weihaiwei or the Weihai Garrison, and sometimes as Port Edward. Weihai was not developed in the way that Hong Kong, the other British colony in the region, was developed, because Shandong Province of which Weihaiwei was part of, was inside Germany's sphere of influence and had only been obtained as a counterbalance to the Russian presence at Port Arthur 130 kilometers across the sea in Manchuria. It was largely used as a naval station and a sanatorium. Its population is 2,804,800 at the 2010 census. 591,982 live in the built up area (Huancui urban district).