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.
Yucheng, a county-level city under the jurisdiction of Dezhou City, Shandong Province, is located in the northwest of Shandong Province. it is a satellite city in Jinan, the capital of Shandong Province, and belongs to the economic circle around the Bohai Sea; it is all plain, high in the south and low in the north, high in the west and low in the east, and tilts slowly from the southwest to the northeast; it is a warm temperate continental monsoon climate with four distinct seasons, obvious dry and wet seasons and sufficient light. In 2017, the total population is 539000, with jurisdiction over 9 towns, 1 township and 2 streets. In 2017, Yucheng achieved a regional GDP of 27.94 billion yuan, an increase of 7.2% year-on-year at comparable prices. In October 2018, Yucheng was selected as the "top 100 counties with comprehensive strength", the top 100 counties and cities with national investment potential, the top 100 counties and cities with green development, the top 100 counties and cities with scientific and technological innovation, and the top 100 counties and cities with new urbanization quality. In October 2018, national farmers were obtained.