Wuzhou (wōˈjōˈ) [key], city (1994 est. pop. 236,200), E Guangxi Zhuang Autonomous Region, S China, a port on the Xi River at the mouth of the Gui River. It is an important trade and shipping center on the Guangxi-Guangdong border. The city has a variety of light and heavy industries, including textile mills, food-processing factories, and chemical plants. A former treaty port, it was the site of a major U.S. air force base in World War II. The name sometimes appears as Wu-chou.