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.
Liaoning Province, referred to as "Liao", is the provincial administrative region of the people's Republic of China and the capital of Shenyang. Liaoning Province is located in the south of Northeast China, bounded by 38 °43 & # 39 N, 118 °53 & # 39 E, 118 °53 & # 39 E, bordering the Yellow Sea and Bohai Sea in the south, Hebei in the southwest, Inner Mongolia in the northwest, Jilin in the northeast, and North Korea across the river by the Yalu River in the southeast, covering a total area of 148600 square kilometers. The topography of Liaoning Province is roughly from north to south, tilting from the east and west sides to the middle, the mountains and hills are separated from the east and west, descend to the central plain, and incline to the Bohai Sea in the shape of a horseshoe, which is composed of mountains, hills and plains; across the Liao River, Hun River, Daling River, Taizi River, Laoyang River and Yalu River