Three tram companies expanded their routes step by step, and collectively reached their maximum extent in 1925 with 328 tramcars and 14 routes. By the 1920s, trams carried supplementary letters to their numbers: 'B' for British and 'F' for French. • The
British system ("Shanghai Tramways"; The Shanghai Electric Construction Co. Ltd.) was the largest with seven routes and 216 trams; • The
French system ("La Compagnie Francaise de Tramways et d'Eclairage Electrique de Changhai") had three routes and 60 trams; • The
Chinese system ("Chinese Tramways Company"; Chinese Electric Power Co. Ltd.) had four routes and 52 trams, totaling 23.5 km in length. 1903 Projet de tramways pour la Concession Française de Shanghai, Chine.jpg|1903 map showing the built and planned tram routes in the French concession Shanghai tramway map 1936.png|1936 Shanghai tram map on recent street map 1936 Shanghai tram map.png |1936 Shanghai tram map 1937 Shanghai tram map.jpg|1937 Shanghai tram map with all three systems Shanghai Tramways and Trolley Buses map in 1939.jpg|1939 tram map of the Shanghai International Settlement, showing disrupted routes During the Japanese occupation of Shanghai in
World War II in 1942, the British and French tram systems were placed under the control of the Japanese backed
puppet state of the
Reorganized Republic of China. During the occupation, some tram lines were demolished to support the Japanese
war effort. After
Japanese surrender in 1945, the tram systems were transferred back to original owners. During the
Korean War, anti-western sentiment and sanctions by the United States made it very difficult for the British and French to operate their respective systems. By 1952 and 1953, the British and French companies were shut down and the three tram systems were consolidated and turned over to local control as part of a
mass campaigns of the
Communist Party to expel foreign influence. Starting from the late-1960s, the number of buses, taxis and private cars increased rapidly, taking over more streetspace and causing traffic congestion. The congestion greatly affected the quality of tram services, and tram lines were gradually dismantled or converted into
trolleybus lines. The last tram line,
No. 3 (from Hongkou Park to Wujiaochang) was dismantled in 1975. ==Technology==