Line 1 of the Hangzhou Metro (Chinese: 杭州地铁一号线; pinyin: Hángzhōu Dìtiě Yī Hào Xiàn) is an arc-shaped rapid transit line running from Xianghu station in western Xiaoshan District to Xiaoshan International Airport in eastern Xiaoshan District, passing through downtown Hangzhou. The line opened on 24 November 2012. It is the oldest in the city's metro network. The line is 52 km (32 mi) long with 33 stations.