Is there a cave group in Yan 'an University? Do we have classes in caves?

You can't have classes in the cave. When you arrive at Yanda University, you can hardly see the real caves. Although they are all under the banner of caves, Yao Yuan Hotel is the owner of the caves. The facilities inside are the same as ordinary hotels, but the outside looks like caves. In fact, the main color of Yan 'an is the blue tile cave brick. The place where classes are held is a general teaching building, and some teaching buildings have imperfect facilities. So it is basically impossible to have classes in caves.