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.
Ningqiang County is located in the southwest of Shaanxi Province, with Qinling Mountains in the north and Pillow Mountain in the south. The county has jurisdiction over 16 towns, 2 subdistrict offices and 200 administrative villages with a total population of 340000. Ningqiang is located in the confluence of the Qinling Mountains and the Bashan mountain system, with high in the southeast, low in the northwest and Wuding Mountain uplift in the middle. Ningqiang has abundant rainfall and humid air, and most areas have a warm temperate mountain humid monsoon climate with strong precipitation, with an annual precipitation of up to 1812.2 mm. Ningqiang County is a mountainous county with the confluence of the north and the south and the belt of Shu. It is the main gateway and golden passage from the northwest to the southwest. Baocheng, Yang'an Railway across the county, 108 National Highway, Western Han Expressway passing through; is the birthplace of the Han River, known as "the first city of the Han River" reputation, in November 2015 Ningqiang County was China