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.
Pengxi County, the old revolutionary base of China, belongs to Suining City, Sichuan Province, and is located in the east of the middle of Sichuan Basin. It is adjacent to Chuanshan District, Shehong City, Daying, Guang'an Wusheng, Jialing District, Xichong and Tongnan District and Hechuan District of Chongqing. It covers an area of 1251 square kilometers. The county has jurisdiction over 19 townships and 1 street office. Pengxi County, where Communist Party of China established the first county-level Soviet government in Sichuan Province, enjoys the reputation of "Zidong Zoulu". Pengxi is the seclusion of Yan Junping, the Taoist school of the Han Dynasty, the ancestral place of the prime minister of the Ming Dynasty, the prime minister of the Qing Dynasty, Zhang Pengyi and the great poet Zhang Wentao. Famous tourist attractions are Chicheng Lake, Tangxing Academy, Gaofeng Mountain,