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.
Yuxi City, a prefecture-level city under the jurisdiction of Yunnan Province, is located in the middle of Yunnan Province, with geographical coordinates between 23 °19 °N, 24 °53'N and 101 °16 °E, 103 °09'E. It borders Kunming, the provincial capital in the north, Puer City in the southwest, Honghe Hani and Yi Autonomous Prefecture in the southeast and Chuxiong Yi Autonomous Prefecture in the northwest, with a total area of 15285 square kilometers. The topography of Yuxi is high in the northwest and low in the southeast, with staggered distribution of mountains, valleys, plateaus and basins, with a maximum horizontal distance of 172km and a maximum vertical distance of 163.5 km. Most of the area is 1,500 meters above sea level. The annual average temperature is 16.4 ℃, the climate is three-dimensional and diverse, there is no severe cold in winter, there is no heat in summer, the four seasons are like spring, dry and wet. Yuxi is the hometown of Nie er, the hometown of clouds and smoke, the hometown of lanterns and the water town of the plateau.