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.
Tianhe District, which belongs to Guangzhou City, Guangdong Province, is located in the east of Guangzhou City. It was established in 1985 by the suburbs of Guangzhou, connected with Huangpu District in the east, Haizhu District in the south across the Pearl River, Guangzhou Avenue in the west and Yuexiu District in the west, and adjacent to Baiyun District in the north. the total administrative area is about 137.38 square kilometers, with 21 streets under its jurisdiction. By the end of 2017, Tianhe District had a registered population of 902800 and a resident population of 1.6979 million. Tianhe District is the central area of the new city of Guangzhou, which is located on the new central axis of the city, connecting the west to the east, and then from north to south, which is the intersection of Guangzhou's east axis and south extension axis. Traffic resources are gathered in the area, with subway, bus rapid transit system (BRT), railway station and other multi-level urban transportation system. Guangzhou landmark CITIC Plaza, Guangzhou International Finance