Yunnan (Yoon-nan), a province of SW. China, bounded on the S. by Annam, Siam, and Burma, with an area estimated at 122,000 sq. m., and a pop. estimated at 11,500,000, having sunk from 15,000,000 through plague and the war of the Mohammedan Panthays (1855-72). The surface is mainly an extensive uneven highland plateau, between whose ranges, which vary in height from 12,000 to 17,000 feet in the north to 7000 or 8000 in the south, are deep defiles through which run the Mekong, Salween, Shweli, and Other rivers of Indo-China. Fertile plains and valleys are numerous. In the northern part the surface is wild, broken, and barren, wrapped in mist and fog, and the population sparse. But the south and south-west are populous and richly cultivated. The first important exploration was by the French in 1867-68. Yunnan, the capital, stands on a great plain in the eastern half of the province, over 6400 feet above sea-level, and near the shore of Lake Tien-chih. It has a flourishing trade and a pop. of 100,000. Yuruari. See Venezuela.