Sanya (Sanya) is located at the southernmost tip of Hainan Island. It is the southernmost tropical coastal tourist city in China. It is the best coastal city in China and the longest-lived region in China (average life expectancy of 80 years).

Sanya City, also known as Lucheng, is also known as "Oriental Hawaii", ranking first in China's four first-tier tourist cities, "Sanwei Hangxia", with the most beautiful coastal scenery on the island. Sanya City is adjacent to Lingshui County in the east, Ledong County in the west, Baoting County in the north and Nanhai in the south. The total land area is 1919.58km2, and the total area of the sea area is 6000km2, of which the planned urban area is about 37 square kilometers. It is 91.6 kilometers long from east to west, 51 kilometers wide from north to south, and has a resident population of 741,900. It is home to more than 20 ethnic groups including Han, Li, Miao and Hui. Sanya is the central city and transportation communication hub in the southern part of Hainan Province. It is also one of the most important foreign trade ports on the southeast coast of China.

On June 14, 2016, the Chinese Academy of Sciences released the “China Livable City Research Report”, which showed that the Sanya Livable Index ranked third among the 40 cities in the country.