At present,China Beijing,Tianjin,Hongkong,Shanghai,Guangzhou,Shenzhen city has a subway,many of the city's subway is also wildly beating gongs and drums to construction.Because the subway comfortable,fast and convenient,has become an important means of transportation of people travel,the subway has become an important part of many city traffic,have also emerged around the different subway culture.The six big city reporter survey found,Hongkong Metro is the most humane; the most stringent Shanghai Metro Management; Guangzhou subway fastest; Tianjin Metro sit not boring; most promising prospects for Beijing metro.