There are several mobile phone applications to choose from in Beijing bus and subway. First, Beijing Tong APP, a mobile government and public service platform launched by Beijing Big Data Administration, aims to provide a unified window for big data to benefit the people. In addition, there is a one-card client in Beijing, which provides cardholders with convenient online services, such as recharging NFC mobile phones, purchasing fast-charging vouchers and inquiring transaction records.

2. There is also the official Beijing Traffic APP, which provides one-stop comprehensive traffic information services for the public. In addition, the smart bus APP integrates Internet thinking into the traditional bus industry and provides real-time bus arrival with big data. In addition, you can also enter "Beijing subway ride-100 million links" through Alipay search box, and enter the applet to use the Beijing rail transit ride code.