The Guangde Taiji Cave in Xuancheng City, Anhui Province is known as the Four Musts in the World. The annual temperature in the cave is between 18-22°. Before and after the New Year's Day, the temperature in the Tai Chi Cave is absolutely comparable to the temperature around 0 degrees outside the cave. It is a very comfortable destination for winter travel. The cave is about 5.4km long and has a dry hole and a water hole. It is a different kind of play experience. After coming out of the cave, you can also experience a hollow cable car. Do you dare to sit down?