Yanyuan County is located on the southeast edge of the Qinghai-Tibet Plateau and on the west bank of the lower reaches of the Yalong River, with an area of 8,398 square kilometers and a population of 335,000. The territory has beautiful scenery, rich products, pleasant climate and simple folk customs. Historically, it flourished because of the "Southern Silk Road", but now it is famous for its advantages of salt and iron, beautiful scenery of mountains and rivers and the marriage customs of Mosuo people in Lugu Lake, and is known as the mysterious "daughter country"