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.
Zepu County, the abbreviation of "Zepuleshan", gets its name from Zele Kushan River. Zeplesan, Tajik, means "river of gold". The river has sand gold, hence its name. Zep, also known as Boskamu, is the pronunciation of "Persian Tikan" in Uyghur language, meaning "fertile land". Belongs to the Kashgar region of Xinjiang, located in the southwest of Xinjiang, the northern foot of Kunlun Mountains, the eastern side of Karakoram Mountains, the western edge of the Taklimakan Desert. It is bounded by the Yeerqiang River in the west, Shache County in the west, Yecheng County in the east and southeast, and Yecheng County in the southwest. It covers an area of 999.96 square kilometers with a population of 200000. Zepu County is 1215-1490 meters above sea level and belongs to warm temperate continental arid climate. The annual average temperature is 11.4 ℃, the extreme maximum temperature is 39.5 ℃, and the extreme minimum temperature is-2.