Beihai, in Cantonese called Bakhoi, is a prefecture-level city of Guangxi, China. Beihai means "north sea" in Chinese, meaning that the place is a seaport on the north shore of the Gulf of Tonkin. Between the years 2006 and 2020, Beihai is predicted to be the world's fastest growing city. Beihai has a large shipyard and is reputed to still be a pirate harbour. Beihai is known within China as a travel destination. While Beihai does suffer from pollution as much of China does, it is not nearly as severe as most other parts of the country.
It has a fairly active nightlife also containing western style bars. The dialect spoken throughout Beihai is "Beihua" a Cantonese dialect, although Mandarin is also known, or at least understood, by most of the population (Mandarin is the official language used in government, business and education above elementary level throughout China.)
Beihai contains three districts and one county, which are subdivided into five urban sub-districts, 23 towns, 3 townships, 87 neighborhood committees, 343 village committees. (see also Political divisions of China#Levels)
After the 1876 Sino-British Treaty of Yantai, eight Western nations (UK, US, Germany, Austria-Hungary, France, Italy, Portugal, and Belgium) set up embassies, hospitals, churches, schools, and maritime customs. Today, 15 of these western buildings remain in Beihai. It officially became an international tourist spot (旅遊對外開放城市) in 1982.
Beihai has greatest high tides at September 1, with the tides being 5 meters (16 feet). Most ports have around 2 metres of high tide; Honolulu has 0.5 meter.
There is a spinning restaurant in the city.