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.
Yuanhui District is Luohe Municipal District, which is located in the central and southern part of Henan Province. Yuanghui District is the transportation hub of Henan Province, less than an hour's drive from Zhengzhou International Airport, 107 National Highway, Beijing-Guangzhou Railway, Beijing-Zhuhai Expressway running from the south to the north, Luobao and Luofu Railway, and Nanluo Expressway from east to west. Railways and expressways have a "double cross" structure. In 2012, the annual GDP of the Source and sink District reached 9.87633 billion yuan. In 2012, Yuanhui District has a total area of 201.6 square kilometers and a population of 320000. It has jurisdiction over 3 towns, 4 streets, one township, 109 administrative villages and 18 urban communities. It is the commercial, cultural and economic center of Luohe City.