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.
Pingding County, which belongs to Yangquan City, Shanxi Province, is located in the east of the middle of Shanxi Province, the western foot of the middle part of Taihang Mountain and the southeast of Yangquan City. The geographical coordinates are 37 °39 °30 "- 38 °07" 30 "N and 113 °25" 55 "- 114 °02" 33 "E, respectively. It is bordered by Yu County and Yangquan City in the north, Shouyang County in the west, Xiyang County in the south, and Jingxing County in Hebei Province in the east. It is the main road of Shanxi-Hebei thoroughfare and the east gate of Shanxi Province. The county seat is 9 kilometers away from Yangquan city and 127 kilometers away from Taiyuan, the provincial capital. County east-west longest 54 km, north-south widest 50.4 km, covering an area of 1391 square kilometers, jurisdiction over 8 towns and 2 townships, population 345000. There are Niangziguan, Guanshan, Kaihe Temple, Guguan Great Wall and other famous scenic spots. In 2018, Pingding County completed the total regional production.