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.
Chaozhou, a prefecture-level city in Guangdong Province, was established in the sixth year of Xianhe in the Eastern Jin Dynasty (AD 331). It has a history of 1674 years. It is a famous historical and cultural city of the country, with a reputation of "Linghai famous state" and "seaside Zoulu". As of 2018, the city has jurisdiction over three districts and one county, with a total area of 3679 square kilometers and a resident population of 2.651 million. Chaozhou is located in the Chaoshan area of eastern Guangdong, the middle and lower reaches of the Han River, Zhaoan County and Pinghe County in Fujian Province in the east, Jieyang City in Guangdong Province in the west, Fengshun County and Dapu County in Meizhou City in the north, and the South China Sea in the south and Shantou City in the south. The name of Chaozhou began in the eleventh year of Emperor Kaihuang (591). It gets its name from the construction of the ancient Chaozhou capital, which means "in the Chaozhou, the tide goes back and forth". With Chaozhou dialect, Chaozhou opera, Chaozhou music, Chaozhou gongfu tea, Chaozhou cuisine.