Beihai is a prefecture-level city located in the southern region of Guangxi, China. It serves as a significant seaport situated on the northern shore of the Gulf of Tonkin.
The city holds historical importance as an international trade port serving several inland provinces, including Hunan, Hubei, Sichuan, Guizhou, and Yunnan. While Beihai possesses a large shipyard, the majority of the local economy is generated through trade activities. Between 2006 and 2020, the city was projected to be the fastest-growing city in the world.