Dunhuang is too hot… Mogao Grottoes have to make an appointment in advance. They are classified as A and B.

Dunhuang is too hot… Mogao Grottoes actually have to make an appointment in advance. There are two kinds of grottoes, A and B. So what’s the difference between the two? In addition, which of these performances is the best?Dunhuang, Gansu Province, Mongolian and Tibetan Autonomous Prefecture of Haixi