Baise, or Bose, is the westernmost prefecture-level city of Guangxi, China bordering Vietnam as well as the provinces of Guizhou and Yunnan. The city has a population of 4.3 million, of which 1.4 million live in the urban area. The name is from Youjiang Zhuang Baksaek, meaning "in, or blocking, a mountain pass". The name Bwzswz is the Zhuang transliteration of the Chinese name.