Digital Dunhuang
Not a promotional virtual tour, but the official digital museum — high-resolution murals, 30 virtual caves.
View on the official siteThat page has an English version.
The Dunhuang Academy's official digitisation project, with an English 'Digital Library Cave' virtual tour of 1,000-year-old Mogao Grottoes murals.
Digital Dunhuang IS an official digital museum (a permanent shared cultural resource), not a marketing virtual tour.