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.
Linwei District of Weinan City is located in the east of Guanzhong Plain, Shaanxi Province, which is called "Xiagu", "Lotus Spoon", "Nanxinfeng" and "Lingyuan" in ancient times. It is the seat of Weinan municipal party committee and municipal government, and the meeting point of Weinan's politics, economy, culture, transportation, trade, logistics center and decision-making exchange and management of the whole city. it is one of the most important birthplaces of Chinese civilization. The region has jurisdiction over 28 towns (offices), with a resident population of 900100 (2017) and a registered household population of 1.0261 million (2016). By the end of 2015, the construction area of the central city of Linwei District has reached 71 square kilometers, and the population of the built-up area of the central urban area has reached 600000. It is the largest city in the Golden Triangle of the Yellow River in Shanxi, Shaanxi and Henan and a regional central city in the east of Guanzhong. With a total area of 1221 square kilometers, as early as the Tang Dynasty