The Beijing Subway is a rapid transit rail network that serves the urban and suburban districts of Beijing municipality. Currently, there are 19 lines of subway including Line 1, Line 2, Line 4 (Daxing), Line 5, Line 6, Line 7, Line 8, Line 9, Line 10,Line 13, Line 14, Line 15, Batong Line, Fangshan Line, Changping Line, Yizhuang Line and Airport Line. Ticket Price: 3 RMB - 9RMB (Except for Airport Line).All lines now collect fares through an automatic fare collection system (AFC) that accepts electronic tickets and the Beijing Yikatong Smart Card, an integrated circuit card (ICC card) for commuters. Riders can purchase electronic tickets and add credit to Yikatong at ticket counters in every station. Yikatong is also accepted on many city buses.