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.
Zhumadian, a prefecture-level city under the jurisdiction of Henan Province, is located in the central and southern part of Henan Province, located in the hilly plain area of the upper reaches of the Huaihe River, on the third geomorphological step of the country, across the eastern edge of Nanyang Basin and Huaibei Plain, in the transition zone between subtropical and warm temperate zone; the total area is 15083 square kilometers, with jurisdiction over 1 district and 9 counties; the total population is 8.0518 million in 2018. Zhumadian is one of the important birthplaces of Chinese civilization, the core area of the creation activities of Pangu, the humanistic ancestor of the Chinese nation, and the hometown of Xuanyuan Huangdi's wife Kuizu. It is the weapons manufacturing center of the warring States period and the hometown of Cai's, Jin's and Jiang's families. There are 7 forest parks in the city, including 4 national forest parks with more natural and cultural landscapes. Zhumadian also has the hometown of Liangzhu, the tomb of Li Si, the prime minister of Qin, and the hexagram pavilion painted by Fuxi.