Tourists visit a duty free shop in Sanya, South China’s Hainan province, Feb 18, 2018. Hainan aims to be an international tourism consumption center.[Photo/Xinhua]

Stitched photo taken on Feb 17, 2018 shows a hotel in Sanya, South China’s Hainan province. Hainan aims to be an international tourism consumption center.[Photo/Xinhua]

A Russian tourist receives cupping treatment at a sanatorium in Sanya, South China’s Hainan province, June 2, 2018. Hainan aims to be an international tourism consumption center. [Photo/Xinhua]

Tourists visit an aquarium in Sanya, South China’s Hainan province, Feb. 17, 2018. Hainan aims to be an international tourism consumption center.[Photo/Xinhua]