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Bloomberg-Xinhua

Bloomberg said it makes sense that China speeds up exports of such vehicles, saying that the country is home to 250 million registered vehicles - the largest fleet in the world - and it's just a matter of time before more of them are resold. It said the quality of Chinese cars has improved to the point where many developing-world consumers may well choose them as a cheaper alternative to used Toyotas or Fords.

Bolton was always an unlikely pick to be Trump's third national security adviser, with a world view seemingly ill-fit to the president's isolationist "America First" pronouncements.

Biomethane, the purified biogas derived from the decomposition of organic matter, will see accelerated development in China, due to refinement of government regulations and increased policy support, industry experts said.