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.
Zichuan District, which belongs to Zibo City, Shandong Province, is located in the middle of Zibo City, bordering Boshan District in the south, Zhangqiu City in the west, Zhoucun, Zhangdian and Linzi in the north, Qingzhou in the east and Linqu and Yiyuan in the southeast. Between longitude 117o41 & #39;-118 °14 & #39;, 36 °22 & #39;-36 °45 & #39;, it is 49 km long from east to west and 42 km wide from north to south, with a total area of 960 square kilometers. Zichuan District has Pu Songling's former residence and Ma'anshan Anti-Japanese site as provincial key cultural relics protection units. The site of Dahe tragedy and the former site of "Great Han Dezhu" in Qing Dynasty are municipal cultural relics protection units. Places of interest include Su Xiang's Tomb, Yang Zhaita, Liaozhai Park, Zichuan Amusement Park and so on. As of 20