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Beijing, Shanghai and Shenzhen, Guangdong province, continued to top the latest list, published in December 2018, as they have every year since its launch.

Beijing's economy firmed up in the first half of 2017, benefiting from the steady development of the service industry and booming scientific and technological innovation, according to information released by the Beijing Municipal Statistics Bureau today.

Before departing, Wang researched Mauritania, especially the city he was going to be posted in.

Beijing Automotive Group Co, the Chinese partner of Hyundai Motor Co and Daimler AG, is betting that developing SUVs and new energy cars is the best way to achieve growth of its brands.

Beijing now is leading the country in 17 areas of AI development and is gradually forming an AI industry ecosystem with global influence.