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.
Tiemenguan is a county-level city directly under the jurisdiction of Xinjiang Uygur Autonomous region. It implements the integrated management system with the second Division of Xinjiang production and Construction Corps and is managed by Xinjiang production and Construction Corps. Located at the southern foot of the Tianshan Mountains and in the eastern part of the Tarim Basin, it is the traffic hub at the intersection of the southern foot of the Tianshan Mountains and the northern slope of the Kunlun Mountains, and a necessary place in the middle of the ancient Silk Road. Tiemenguan City is composed of "one district and two towns", covering an area of 590.27 square kilometers, about 50 kilometers away from Korla, the capital of Bazhou. The name of the city comes from "Tiemenguan", one of the 26 passes in ancient China. No. 1 Xingjiang Road, Tiemenguan City, Municipal people's Government. Tiemenguan City was established on December 29, 2012. On December 29, 2018, the sixth national unity and progress demonstration zone (unit) was named by the State Civil Affairs Commission.