China's Palace Museum, also known as the Forbidden City, partially reopened on May 1, the first day of the May Day public holiday, after a three-month closure due to the coronavirus crisis. /CFP

Early in the morning, visitors were spotted waiting in line at a distance from each other at the main entrance. /CFP

Every visitor must make an online reservation and the daily number of visitors is limited to 5,000, significantly less than the 80,000 limit before the pandemic. /CFP

Before entering, visitors need to show their ID card and health QR codes on a mobile phone app. /CFP

During their visit, visitors need to wear face masks and keep at a one-meter distance from each other. By Thursday, all tickets had been sold out for the five-day public holiday. /CFP