Buses, subways, trams and their merchants. Nanjing Capital Card is a prepaid card issued by Nanjing Citizen Card Co., Ltd. in real-name registration system. It can be used on public transport such as buses, subways, trams and merchants under Zijin Card. Zijin Card is a high-end card issued by Zhihui for enterprises, institutions and group customers, which can be used in all consumption fields of Zhihui.