Introduction to Kaiyuan South Cave: Nandong is the first of the eight ancient scenic spots in Kaiyuan and was first discovered in the Ming Dynasty. According to the records of Amizhou (known as Kaiyuan in ancient times), Yang Sheng'an, the champion of the Ming Dynasty, once visited this place and was intoxicated by the scenery before him. He wrote the word "Nandong" in his own handwriting. In 1574, the governor of Yunnan, Zou Yinglong, changed the name to "Tongling" after his visit. It has a history of more than 400 years.