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.
Altay region, one of the five regions of Xinjiang Uygur Autonomous region, is under the jurisdiction of Yili Kazakh Autonomous Prefecture and is based in Altay City. Located in the north of Xinjiang, bordering Russia, Kazakhstan and Mongolia; the landforms are complex and diverse, dry and hot in summer and cold in winter; the total area is 117989.21 square kilometers, under the jurisdiction of six counties and one city; the total population in 2017 is 671616. Altay region is the only area bordering Russia in northwest China, and it is an important node city of the Silk Road Economic Belt and Xinjiang participating in the construction of China-Mongolia-Russia Economic Corridor; it has four national land ports; it is a relatively abundant water area in Xinjiang and is known as the "water tower" in northern Xinjiang; it is one of the six major forest areas in China, and it has been identified by the State Council as the ecological functional area of mountain grassland with water conservation. twenty