The largest province of China, lies in the W. between Thibet (NW.) and Yunnan (SW.); more than twice the size of Great Britain; a hilly country, rich in coal, iron, etc., and traversed by the Yangtse-kiang and large tributaries; Chingtu is the capital; two towns have been opened to foreign trade, opium, silk, tobacco, musk, white wax, etc., being chief exports.