Yunnan (4,000), the extreme south-western province of the Chinese Empire; is fertile particularly in the S.; yields large quantities of maize, rice, tobacco, sugar, and especially opium, and abounds in mineral wealth, including gold, silver, mercury, as well as iron, copper, and lead; the country was long a prey to revolt against the Chinese rule, but it is now, after a war of extermination against the rebels, the Panthays, the Burmese, reduced to order.