Tourists wearing masks climb the Badaling section of the Great Wall in Beijing, on March 24, 2020. The scenic spot reopened to the public on Tuesday and implemented a real-name ticket purchasing system. Tourists are required to have their ID cards checked, showing their health code before the visit and have to wear masks and follow a designated climbing route. (Photos: China Daily)

Visitors show their health codes at the entrance to the Badaling section of the Great Wall in Beijing, on March 24, 2020.