*** This App is discontinued. However the functionality remains ***
Shenzhen Tong (Chinese: 深圳通) is a contactless smartcard system used for electronic payments in public transportation and some other areas in Shenzhen, Guangdong Province, People's Republic of China.
This unofficial app allows checking of the delayed Shenzhen Tong card balance by just entering the card number.
If your device supports NFC, you can also read your Shenzhen Tong card, to check the real-time balance and the latest 10 transactions.