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.
Fengkai County, which belongs to Zhaoqing City, Guangdong Province, is located in the northwest of Guangdong Province. It is not only an important part of the "Xijiang Corridor" economic region, but also the intersection of the "Pearl River Delta" and the southwest. It is between 23 °13 north latitude & #39;-23 °59-#39;, east longitude 111o 21-#39;-112 °02-#39;, with a total area of 2723.93 square kilometers. Fengkai is a mountainous and hilly area, with high mountains in the east and hills in the west, with terrain from east to west, concave in the middle and low in the north and south. Belongs to the subtropical monsoon humid climate. Affected by the monsoon, the climate is warm, the winter is short and the summer is long, and the frost-free period is long. As of 2017, Fengkai County has jurisdiction over 16 towns, with a resident population of 414500 and a registered permanent population of 522000. County