海中绿洲是指中国哪个城市？

海中绿洲是指中国的深圳市。
  
Shenzhen is a major city in Guangdong Province, located in the southern part of China. It is often referred to as an "oasis" in the sea due to its rapid development, modern infrastructure, and booming economy. The city was transformed from a small fishing village into a metropolitan area with a population of over 12 million people. With its stunning skyline, beautiful parks, and numerous high-tech companies, Shenzhen has become a symbol of China's economic success. Its proximity to Hong Kong also makes it a popular destination for business and tourism. The nickname "oasis" highlights the contrast between the vibrant cityscape and the surrounding sea, making Shenzhen a unique and attractive destination.