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.
Wen County, which belongs to Longnan City, Gansu Province, gets its name from the text of ancient Wenzhou. It is located at the southernmost tip of Gansu Province and at the border with Sichuan and Shaanxi provinces. It is located in the Qinba Mountains and is the south gate of Gansu Province. Wen County has jurisdiction over 14 towns, 5 townships and 1 nationality township, with a total area of 4994 square kilometers, a total population of 244765 and a resident population of 228600 (2017). Wenxian County is located in the West Qinling Mountains and the southern Qinling Mountains, with an elevation of 550m to 4187 meters above sea level. It is a subtropical mountain climate with no heat in summer and no severe cold in winter. It is known as "Longshang Jiangnan" and "Xishuangbanna of Gansu". It has Wenxian Tianchi National Forest Park and Wenxian Huanglingou National Wetland Park. Wen County is also known as "the hometown of giant pandas", and the number of giant pandas accounts for about the number of giant pandas in the country.