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.
Jilin Province, referred to as "Ji", is the provincial administrative region of the people's Republic of China and the capital of Changchun. Jilin Province is located in the middle of Northeast China, connected with Liaoning, Inner Mongolia and Heilongjiang, bordered by Russia and North Korea, and located in the geographical center of Northeast Asia. By the end of 2017, it had jurisdiction over 8 prefecture-level cities and 1 autonomous prefecture, with a total of 20 county-level cities, 16 counties, 3 autonomous counties and 21 municipal districts. The establishment of Jilin began in the tenth year of Qing Shunzhi (1653). In the 12th year of Kangxi (1673), the Qing government built Jilin City and named Jilin Wula, from which Jilin got its name. Qianlong 22 years (1757), officially changed its name to "Guard Jilin Wula and other places General", referred to as "Jilin General". Jilin Province is a political and military conflict in Modern Northeast Asia