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.
Zhaotong, a municipal administrative district under the jurisdiction of Yunnan Province, is located in the northeast of Yunnan Province, at the junction of Yunnan, Guizhou and Sichuan provinces, along the lower reaches of the Jinsha River, and in the excessive uplift zone from Sichuan Basin to Yunnan-Guizhou Plateau. The topography of Zhaotong is high in the south and low in the north, with the lowest elevation of 267m (Shuifu County) and the highest elevation of 4040 m (Qiaojia County), with a total area of 23021 square kilometers. Zhaotong has jurisdiction over 10 counties and 143 townships (offices) in District 1 (Zhaoyang District). At the end of 2010, the total population was 5.213 million, including 542000 from 23 ethnic minorities, including Miao, Yi and Hui. In history, Zhaotong is an important gateway from Yunnan Province to Sichuan and Guizhou provinces, and an important channel for Central Plains culture to enter Yunnan. One of the three major birthplaces of Yunnan culture (Zhaotong Kunming, Dali), known as Xiao Kunming, is a Chinese work.