Shèng Díyàgē shì Měiguó Jiāzhōu de yí zuò chéngshì.
San Diego is a city in California, USA.
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culture
The more common transliteration for San Diego in mainland Chinese is 圣地亚哥 (Shèngdìyàgē). 迪亚哥 is sometimes used as a standalone first name transliteration for Diego.