Customers walk past the store of OMEGA, a Swiss wristwatch brand, at the world's largest duty-free shopping center in Sanya city, South China's Hainan province, Sept 27, 2014. [Photo/IC]

CCustomers at the outlet of Estee Lauder, a US-based cosmetics manufacturer and marketer, at the world's largest duty-free shopping center in Sanya city, South China's Hainan province, Sept 27, 2014. [Photo/IC]

Skincare products on display at SK-II, a Japan skincare company, at the world's largest duty-free shopping center in Sanya city, South China's Hainan province, Sept 27, 2014. [Photo/IC]