Passengers walk out of a carriage on the newly opened subway line in Chengdu, capital of southwest China's Sichuan Province, Sept. 27, 2010. After four years' construction, the subway Line 1 in Chengdu witnessed its pilot run Monday. This is the first subway line operated in west China. The subway in Chengdu, with a length of 18.5 km, has 17 stations across the city. [Xinhua]