The smart card is anintegrated circuit card with a high-tech chip. It can be used as an electronicwallet which can store multiple payment records and be rechargeable. Atpresent, the smart card used in Nanjing metro can also be applied in other 41cities including 13 Jiangsu provincial ones and Beijing, Tianjin, Chongqing,Xiamen). Panda Information Company also undertook the transformation project ofurban public transport AFC smart card system in Wuxi metro, Wuxi metro line 2and Suzhou metro line 2.