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.
Luohe City, a municipality of Henan Province, is located on the southwest edge of the North China Plain. Funiu Mountain in the west and plain in the east is the joint of the second and third steps on the Chinese terrain; it is located on the southern edge of the warm temperate zone and belongs to the warm transitional monsoon climate. In the course of the year, there is an alternation of hot and cold and four distinct seasons. It has jurisdiction over 3 municipal districts and 2 counties with a total population of 2.8413 million in 2018. Luohe has a long history. The seven-tone bone flute, the national treasure unearthed at the Jiahu site, is the earliest musical instrument in the world; the oracle bone inscription symbol found 8000-9,000 years ago is the earliest written prototype in the world so far; the wine-making relics unearthed push the history of human wine-making to more than 9000 years ago; Xu Shen, who compiled the world's earliest dictionary Shuo Wen Jie Zi, also lived in this land. November 2018, enter