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.
Linxia Hui Autonomous Prefecture (Linxia Prefecture for short) is one of the two major Hui Autonomous prefectures in China, which was established in November 1956. Linxia Hui Autonomous Prefecture is located in the southwest of central Gansu Province, the upper reaches of the Yellow River. It is bordered by Lanzhou to the north, Lintao River to the east and Dingxi City to the east, Jishi Mountain to the west and Haidong area of Qinghai Province to the west, and Taizi Mountain to the south to Gannan Tibetan Autonomous Prefecture. The total area is 8169 square kilometers. The resident population is 2.0441 million (2017). It has jurisdiction over 1 county-level city, 5 counties and 2 autonomous counties. In 2017, Linxia State achieved a GDP of 23.884 billion yuan, of which the added value of the primary industry was 3.889 billion yuan, the secondary industry was 4.318 billion yuan, and the tertiary industry was 15.677 billion yuan.