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.
Ankang City (AnKang) is located in the southeast of Shaanxi Province, with Qinling Mountains in the north, Bashan Mountain in the south and Han River running from east to west. The river valley basin (Ankang Basin) is in the middle, with an area between 31 °42 latitude and 33 °49 'north latitude and 108 °01 longitude and 110 °01' east longitude. It has jurisdiction over 1 district and 9 counties. Ankang is located in the hinterland of Qinba and the bank of Han River. It is known as & quot; Xi'an back Garden & quot;. Ankang City covers an area of 23391 square kilometers, with 289000 hectares of arable land. In 2016, Ankang has a resident population of 2.656 million. This area is a typical representative area of animals and plants in northern subtropical China, with rare animals such as antelope, crested ibis, giant panda, clouded leopard, giant salamander and so on. It is the main producing area of tea, silkworm cocoon, paulownia and raw lacquer in Shaanxi Province and Northwest China. Because within the territory