From Wikipedia (edited):  “The Mogao Caves, also known as the Thousand Buddha Grottoes, form a system of 500 temples, 25 km (16 mi) southeast of the center of Dunhuang, on the Silk Road, in Gansu province. The caves may also be known as the Dunhuang Caves; however, this term is also used as a collective term to include other Buddhist cave sites in and around that area, such as the Western Thousand Buddha Caves, Eastern Thousand Buddha Caves, Yulin Caves, and Five Temple Caves. The caves contain some of the finest examples of Buddhist art, spanning a period of 2,000 years.”  Our scan shows parts of the four cards, issued by China National Philatelic in 2024 as set MC-140, and the cardboard cover.  Grade: 1