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.
Shantou, referred to as "Shantou", a prefecture-level city and special economic zone in Guangdong Province, is an important port city along the southeast coast, an important gateway to the Maritime Silk Road, a central city in eastern Guangdong, and a deputy central city in Guangdong Province. As of 2018, the city has jurisdiction over six districts and one county, with a total area of 2198.7 square kilometers and a resident population of 5.6385 million. Shantou is located in the Chaoshan area of eastern Guangdong, at the southern end of the Han River Delta, Chaozhou to the north, Jieyang to the west, and the South China Sea to the southeast across the sea from Taiwan. The three rivers Hanjiang, Rongjiang and Lianjiang enter the sea is the only city where Chinese mainland has an inner bay. Shantou is an open port city along China's coast, a famous hometown of overseas Chinese, and one of the earliest special economic zones in China. There are more than 5 million overseas Chinese and compatriots in Hong Kong, Macao and Taiwan, covering more than 100 countries and regions in the world. ..