Baise, Wade-Giles romanization Pai-se, also spelled Bose, city, western Zhuang Autonomous Region of Guangxi, China. It lies along the You River, which flows southeast to Nanning (the capital of Guangxi), and is situated at its junction with its tributary, the Chengbi River. It is at the limit of navigation on the You River for small craft and is also at the centre of a highway network radiating to the north and west. Transport routes also lead into the neighbouring provinces of Yunnan and Guizhou, linking them with Nanning and central Guangxi.
Until comparatively recent times, Biase was in the territory of non-Han Chinese tribes and was only loosely controlled by the central government. Baise was set up and fortified in 1730 as a garrison among the tribes, but not until 1875 was a regular civil administration established there. In the late 19th century Baise became a trading centre, and a considerable colony of merchants from Guangzhou (Canton) settled there. The goods collected for export include kapok (a fibre used as stuffing), ramie (a textile fibre), aniseed, edible fungi, and various herbs. In the 19th and early 20th centuries Baise served as a centre for opium traffic, with processed opium from Yunnan and Guizhou being collected there by Cantonese merchants for shipment to Nanning, Guangzhou, Hong Kong, and Shanghai. Since 1949 some industries have been developed in the city, including power generation, coal mining, sugar refining, tobacco curing, rice milling, and ceramic manufacture. Completion in 1997 of the Nanning-Kunming (Yunnan province) rail line, which passes through Baise, has greatly improved the city’s communication links. Pop. (2002) 126,893.