HAIKOU - Tourism revenue of China's southern island province of Hainan grew by 11.5 percent year-on-year to 7.67 billion yuan ($1.08 billion) during the National Day holiday, authorities said on Tuesday.

Hainan received a total of 4 million visitors during the weeklong holiday, up 5.8 percent compared with the same period of last year, among which close to 2.3 million trips were single-day tours, according to the provincial department of culture and tourism.

The scenic spots on the island attracted 2.6 million people, an increase of 8.3 percent year-on-year.

Four offshore duty-free stores in Hainan received over 220,000 customers during the holiday, raking in 385 million yuan in sales, up 38.9 percent and 57.4 percent year-on-year, respectively.