YUNNAN, a province of China, situated on its southwestern frontier, bounded on the N. by Sechuen and Tibet, on the E. by Quang-See and Kw-choo, on the S. by Anam and Laos, and on the W. by Burmah and Tibet. It is about 540 miles in length by 330 in breadth, with an area of 107,969 square miles; and though mountainous, it is one of the most fertile and opulent in China, being well watered both by rivers and lakes. Its produce is gold, copper, and tin, amber, rubies, sapphires, agates, pearls, precious stones, marble, musk, silk, elephants, horses, gums, medicinal plants, and linen. It has a vast commerce, contains twenty-one cities of the first class, and fifty-five of the second and third. The population is estimated at five and a half millions.