The Mogao Grottoes, a renowned UNESCO World Heritage site in the city of Dunhuang, Northwest China's Gansu province, partially reopened on May 10, ending its 108-day closure due to the COVID-19 outbreak. The reopening comes with a host of epidemic prevention measures. All visitors are required to reserve tickets ahead of their trips, and only 1,800 visitors are allowed each day, accounting for 30 percent of its tourist capacity.