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.
Liancheng County, also known as Liancheng, is located in the southern section of the Wuyi Mountains in the western mountains of Fujian. It is located at the junction of Fujian, Guangdong and Jiangxi provinces. The county is bordered by Yong'an City and Xinluo District in the east, Shanghang in the south, Changting in the west and Qingliu in the north. At the end of 2018, it had jurisdiction over 17 townships with a registered population of 348443 and was familiar with the Liancheng dialect of Hakka in western Fujian. According to "Reading History Fang Yu Ji Yao", Liancheng County was built in the Southern Song Dynasty, which got its name from the county's governance of Donglianfeng Mountain. The Yuan Dynasty was changed to Liancheng County. Lian Castle was built in Song and Yuan dynasties (1098mur1100), belonging to Changting County, and Liancheng County was established in Shaoxing three years (1133). Yuan to Zheng six years (1346) renamed Liancheng. Subordinate to Tingzhou, Tingzhou Road, Tingzhou Capital, Tingzhang Road. Counties were established successively in Xinquan and Lianfeng from 1929 to 1934.