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.
Hengshui, a prefecture-level city of Hebei Province, is located in the southeast of Hebei Province, between longitude 115o10mm UV 116o 34km east and latitude 37 °03qq. it is adjacent to Cangzhou City and Dezhou City, Shandong Province in the east, Shijiazhuang City in the west, Xingtai City in the south, Baoding City and Cangzhou City in the north, with a total area of 8815 square kilometers. Hengshui City is located in Hebei alluvial plain, the terrain slowly tilts from southwest to northeast, 12 meters ~ 30 meters above sea level. It belongs to the continental monsoon climate zone, which is warm and semi-arid. It is an important processing and supply base for agricultural products in Beijing and Tianjin. Hengshui belongs to the "1th 93rd" plan of the Bohai Rim Economic Circle and the Capital Economic Circle. It is a member city of the Joint Conference of Mayors of Regional Cooperation around the Bohai Sea. It is called the "Golden Cross" by Fei Xiaotong.