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.
Liangyuan District is the municipal district of Shangqiu City, Henan Province, located in the north of Shangqiu City, the south bank of the old Yellow River, and located at the junction of Henan and Shandong provinces. It is adjacent to Suiyang District in the south, Shangqiu New area in the east and Yucheng County, Xilian Minquan County and Ningling County, and Heze City in Shandong Province to the north. As of 2017, the region has jurisdiction over 16 streets (towns and townships), with a total area of 542square kilometers and a total population of 496000 (excluding Shangqiu New area). Liangyuan Park is the economic, cultural, transportation and information center of Shangqiu City, and the regional trade and logistics center in the border area of Henan, Shandong, Jiangsu and Anhui provinces. Longhai Railway, Beijing-Kowloon Railway, Zheng-Xu High-speed Railway, Shanghai-Hangzhou High-speed Railway, Beijing-Kowloon High-speed Railway, Lianghuo Expressway,