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.
Xiajin County, which belongs to Dezhou City, Shandong Province, gets its name from "the important Jin of the Qi-Jin Union". It is located in the northwest plain of Shandong and the junction of Shandong and Hebei provinces. Texas in the north, Liaocheng in the south and the Beijing-Hangzhou Grand Canal in the west. As of 2018, Xiajin County has jurisdiction over 10 towns, 2 townships, 1 street and 1 provincial development zone, 314 communities, with a total area of 882square kilometers, cultivated land of 900000 mu and a resident population of 519600 at the end of 2018. Xia Jin is called "Yancheng" in ancient times, which has a history of more than 2200 years. Deshang Expressway, Qingyin Expressway, National Highway 308, Provincial Highway 254 and 315 crisscross, running through the whole territory of Xiajin County. Xiajin County has a total area of 128000 mu of original ecological forest resources along the old route of the Yellow River, which is a national AAAA tourist scenic spot, a national forest park and a national holiday.