After being suspended for 41 days, the metro service in the northern Chinese city of Shijiazhuang resumed operation on Friday as the COVID-19 situation improved. /CFP

Shijiazhuang, capital of northern China's Hebei province, experienced a COVID-19 resurgence and was put under lockdown in January. /CFP

As the situation improved however, the local government announced the gradual resumption of work and production on February 3. /CFP

While Shijiazhuang's subway system resumed operation on Friday, passengers were still required to wear masks during their entire journey and undergo temperature and health code checks before entering the station. /CFP