Nansan Town, which belongs to Zhenkang County, is located in the new county town of Zhenkang County, the southwest border of Yunnan Province, the west of Lincang and the middle of the China-Myanmar border. It belongs to karst landform, with a boundary line of 47.583 kilometers and a land area of 535.98 square kilometers. It is one of the three townships (towns) on the border of Zhenkang County, and the second largest De 'ang settlement in China, 884 kilometers away from Kunming, the provincial capital. The geographical coordinates are 98 41'12 "-98 56'15" east longitude and 23 42' 09 "-23 52' 21"north latitude, bordering Muchang Township in the east and Gengma in the south. The ancient name Shihuang or Huangdi is a land shortcut to Yangon. Known as "the hometown of tea" and "the second hometown of overseas Chinese", it is the second largest De 'ang settlement in China. According to the investigation of modern cultural relics, the paleolithic site in Tanghe East of Nanpian River was discovered in Nansan, which proved that there were human activities in Nansanlu1-50,000 years ago. Relevant historical books and local chronicles prove that Nansan has a long history. In Ming Dynasty, Zhenkang Tuzhizhou paid tribute to Yunnan Chief Secretary six times. Since ancient times, Zhenkang has excellent ecology, rich animal resources and a large number of rare animals. Nansan is rich in tourism resources. There are rare transnational caves in the world, colorful ethnic customs, beautiful legends of Lingxiu border town, picturesque trees and stones, beautiful goldfish mountain, charming scenery of Nanpeng River Valley, magical and beautiful jade pillars, a wide variety of wild ancient teas, unique tea customs of ancient tea farmers, charming Guanyin Cave Mountain, more than 600-year-old Dai people, and unique tea customs of Dai uncles. South Umbrella, with Shan Qi, beautiful water, secluded caves, steep cliffs, strange trees, many flowers, secluded blue land and harmonious wind, is a good place to travel. Appreciating the beautiful scenery of Nansan makes people linger, and appreciating the tea art of people living in Nansan makes people memorable. The wonders of transnational caves in Nansan Town. Nansan Cross-border Cave is located on the Stone Vase Mountain of Yanchanggou Village Group of Baiyan Village Committee, next to the 124 national border. This cave is a natural place, spanning China and Myanmar. The cave is spacious and rugged, and the landscape is unique and charming. Entering China Cave and leaving Myanmar Cave is of great tourism development value.