Introduction to Gongshan County: The county seat of Gongshan Dulong and Nu Autonomous County is Dandang, which is located on the west bank of the Nu River at the eastern foot of Gaoligong Mountain in the center of the county. Its name is the transliteration of Dulong language, "Dandang" It's a pine tree, and "dang" means pingzi, which together means pine tree ping. The small town of Dandang is hidden deep in the infinite scenery of the Nujiang Grand Canyon. It is backed by green mountains and faces the waves of a river; to the east and west are the towering Gaoligong Mountains and Biluo Snow Mountains, shrouded in white clouds; to the north and south, canyons lock the sky and river waves are faintly visible. Dandang is the main part of the county. It is backed by green mountains and on the left is the crystal clear Pula River, which merges into the rolling Nu River. It is home to the county government, people's congress, CPPCC, public security, culture and education, hospitals, banks, postal services, telecommunications, hotels and other agencies. , enterprises and institutions are concentrated here. However, Dandang County extends to the south along the river, mountains and rivers. On both sides of the spacious asphalt road, there are many departments and units such as courts, procuratorates, armed police forces, land management, water and electricity, forestry, television broadcasting, primary and secondary schools, etc. To the southernmost steel bridge across the Nu River, it stretches for three or four kilometers. If you stand on the Nujiang Bridge at the southern end and watch at night, with the lights lit, it will seem like the long Milky Way is falling down on the world.