The Sichuan Basin (Chinese: 四川盆地; pinyin: Sìchuān Péndì), formerly transliterated as the Szechwan Basin, sometimes called the Red Basin, is a lowland region in southwestern China. It is surrounded by mountains on all sides and is drained by the upper Yangtze River and its tributaries. The basin is anchored by Chengdu, capital of Sichuan province, in the west, and the direct-administered municipality of Chongqing in the east. Due to its relative flatness and fertile soils, it is able to support a population of more than 100 million. In addition to being a dominant geographical feature of the region, the Sichuan Basin also constitutes a cultural sphere that is distinguished by its own unique customs, cuisine and dialects. It is famous for its rice cultivation and is often considered the brea