Introduction to Shangdong: Shangdong is called "Cloud Mist Field", also known as "Cloud Cave". The wonderful thing is "Yunkou", a huge rock blocks the convective air in the cave, making the temperature of the Shangdong all year round. Keep it around 23 degrees Celsius. The Shangdong Cave has rich landscapes, including "Reflection Lotus", "Eternal Twin Plums", "Panda's Residence" and other attractions. The landscapes of "Oolong spitting water" and "Golden Rooster Independence" are traces of sea water erosion at that time, providing evidence for studying the formation of Shanjuan Cave.