Chengdu is one of the largest cities in southwest China and the capital city of Sichuan Province. With a large population and huge transportation needs, public transportation is of vital importance to this city. After years of construction and development, Chengdu's public transportation system has formed a modern multi-level and multi-modal transportation network including buses, subways, railways and BRT (Bus Rapid Transit System). The construction and operation of these transportation systems have provided Chengdu citizens with convenient and fast travel modes.