Passengers ask a staff member how to scan a QR code to register their real names at a subway station in Wuhan, Central China's Hubei province, as the city resumes rail transportation after a two-month suspension, on March 28, 2020. [Photo by Ke Hao/chinadaily.com.cn]

Residents are asked to wear masks to take subways. Before getting into the subway stations, they are also required to scan the QR codes through widely popular mobile apps that are registered by real name so that their travel histories can be tracked. When they get off the train, passengers will have to scan the QR code posted in the carriage again in order to track which carriage they take.

Infrared thermometers are installed in the security check area to monitor passengers' temperatures. Those who have normal temperatures are allowed to get in, otherwise they will be subject to further temperature checks or quarantine.

Security employees are sent on every train to guide passengers and provide them with necessary services.

Jin Jing, head of the Hongshan Square Station, said all public areas and facilities in the station have been thoroughly cleaned up and disinfected before the subway restarted operation.