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.
Tongren City, a prefecture-level city under the jurisdiction of Guizhou Province, is located in the northeast of Guizhou Province, in the hinterland of Wuling Mountain area, in the east of Huaihua City, Hunan Province, and bordering Chongqing in the north, high in the northwest and low in the southeast, the whole territory is mainly mountainous, most areas belong to the mid-subtropical monsoon humid climate zone; the total area is 18003 square kilometers, and it has jurisdiction over 2 municipal districts, 4 counties and 4 autonomous counties; the resident population is 3.1688 million in 2018. The history has a long history. The Qin Dynasty was the hinterland of the central Guizhou county, and it was transferred to Wuling County in the Han Dynasty, and the county was ruled only in the Shu Han Dynasty; the Tang Dynasty belonged to Sizhou, Jinzhou and Qianzhou respectively. At the end of the Song Dynasty and the beginning of the Yuan Dynasty, Sizhou and Sinan were set up to proclaim comfort, and the Yuan Dynasty set up a lawsuit against the army and people of the Copper people's Congress and the people of Xiaojiang. Ming Yongle withdrew Sizhou and Sinan Xuanwei Department in the eleventh year of the Ming Dynasty, and set up four prefectures of Tongren, Sinan, Shiqian and Wuluo at present, which belong to the newly-built