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.
Lai'an County, which belongs to Chuzhou City, Anhui Province, is located in the east of Anhui Province. Founded in the 26 year of Qin Shihuang (221 BC), it is called Jianyang County. After several Yi county name, to the first year of Zhongxing in the Southern Tang Dynasty (958), named Lai'an County. Lai'an County has jurisdiction over 12 townships, two provincial economic development zones, two national 4A tourist attractions and a national wetland park, with a land area of 1481 square kilometers and a total population of 490900. Lai'an County, adjacent to Nanjing Jiangbei New area, a national new area, is the core layer of Nanjing metropolitan area and an important gateway of Nanjing Jiangbei. The Chahe town under its jurisdiction is adjacent to Nanjing High-tech Development Zone and is close to Nanjing Metro Line 3 Forest Farm Station. Only 12 kilometers away from Nanjing Yangtze River Bridge. In 2017, the annual gross domestic product (GDP) of Lai'an County reached 15.94 billion yuan.