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"Coffee is a complex mixture of hundreds of chemicals that includes both carcinogens and anti-carcinogens," said Sam Delson, a spokesman for the agency. "The overall effect of coffee consumption is not associated with any significant cancer risk."

"China's digital transformation has developed at an unprecedented speed and has created huge and precious opportunities. The Chinese market has become one of our largest markets globally," said Kang Rong, vice-president of Microsoft Greater China.

"Cross-border e-commerce has made rapid and notable achievements since the pilot zones were established and has become a new area of growth for imports and exports," Li said. "We should facilitate domestic consumption and at the same time improve export quality in the global market."

"China's pharmaceutical market has the greatest potential in the world, due to its tremendous population, even though it is now second to the United States," said Shi Lichen, founder of medical consultancy Beijing Dingchen Consultancy.

"Chinese tourists, especially millennials, live on their smartphones. The Chinese tourists you see around the world are glued to their smartphones, and WeChat is the center of that," Towson said.