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.
Wucheng County, which belongs to Dezhou City, Shandong Province, is located in the northwest border of Shandong Province, the northwest plain of Shandong Province, and the east bank of the Beijing-Hangzhou Grand Canal, ranging from 37 °03-#39; to 37 °23-#39;, east longitude 115 °51-#39; to 116 °17-#39;, with a total area of 748 square kilometers. Wucheng County belongs to the Asian warm temperate monsoon zone, continental climate, hot and cold dry and wet changes are obvious, rain and heat at the same time, sufficient light, four distinct seasons. As of 2018, Wucheng County has jurisdiction over 1 street and 7 towns. The county government is stationed in Guangyun Street. By the end of 2017, Wucheng County had a resident population of 385400. At the beginning of the Western Jin Dynasty, it followed the establishment of the Eastern Han Dynasty. Taikangzhong (about 284 years) went to the word "East" and renamed it Wucheng.