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.
Anding District, which means "peaceful and stable", belongs to Dingxi City, Gansu Province. It is the seat of Dingxi Municipal Party Committee and Municipal Government. It is located in the central part of Gansu Province. It is 82.9km long from north to south and 73.3km wide from east to west, with a total area of 4225 square kilometers. The region has jurisdiction over 12 towns, 7 townships and 3 subdistrict offices, with a resident population of 430500 at the end of 2017. Anding District was built in 1096 AD (the second year of Shaosheng in the Northern Song Dynasty), named "Dingxizhai", and Dingxi County was founded in 1142 (the second year of Jin Huangtong). In September 2003, Dingxi County withdrew its county and set up a district, which was renamed as "Anding District of Dingxi City". Anding District is one of the birthplaces of the Yellow River civilization, the important town of the ancient "Silk Road" and the necessary place for the New Eurasian Continental Bridge. It is known as "Gansu throat and Lanzhou Gateway", which is far away from the provincial capital Lanzhou.