San Diego (/ˌsæn diˈeɪɡoʊ/ SAN dee-AY-goh, Spanish: [san ˈdjeɣo]; Spanish for 'Saint Didacus') is a city on the Pacific Ocean coast of Southern California located immediately adjacent to the Mexico–United States border. With a 2020 population of 1,386,932, it is the eighth most populous city in the United States and the seat of San Diego County, the fifth most populous county in the United States, with 3,338,330 estimated residents as of 2019. The city is known for its mild year-round climate, natural deep-water harbor, extensive beaches and parks, long association with the United States Navy, and recent emergence as a healthcare and biotechnology development center. San Diego is the second largest city in the state of California, after Los Angeles.
Yunxian, under the jurisdiction of Lincang City, Yunnan Province, is located in the southwest of Yunnan Province and at the junction of Dali, Pu'er and Lincang; it is a mountainous and semi-mountainous county with a low-latitude plateau subtropical monsoon climate and warm temperate monsoon climate; the total area is 3760 square kilometers, it has jurisdiction over 7 towns and 5 townships, and the permanent population is 466700 in 2018. Yunxian County is the north gate of Lincang area and the vast hinterland of Yunnan Province. The Lancang River, high mountains, river valleys and hot dams form a special three-dimensional climate and natural scenery. There are Great Snow Mountains, Dabing Mountain primeval forests, Nago River, Wenzhu River, Nayu River, River Valley Hot Springs and so on. There are also cultural relics and cultural landscapes such as bronze drums, bronze spears, Yuan Ming pottery, Maolan Chang'an Bridge, County Writing Pagoda, ancient mosques and magnificent Dawu temples. 2018