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Beijing South, one of Beijing's three major railway hubs and one of Asia's largest train stations, has faced questions in the media recently over poor passenger experiences, including long waiting lines for taxis, "black cabs" outside of the station that overcharge and difficulties entering and leaving the station.

Beijing received more than 4.6 million tourists during the May Day holiday. Tourism revenue generated during the period totaled 4.18 billion yuan (around 590 million U.S. dollars), according to Beijing Municipal Bureau of Culture and Tourism.

Beijing ranked as the top science city globally, followed by New York, Boston, San Francisco/San Jose and Shanghai, in the Nature Index global science city 2020 rankings released during the recently concluded Zhongguancun Forum.

Because nearly 30,000 builders and engineers from more than 40 countries such as the Netherlands, Russia, Italy, Turkey and Serbia are working together at the Amur project, and many works demand a large number of people, construction and machinery－as well as solid coordination between various parties－all of the company's managers and engineers have to pass a language test and be able to resolve multiple issues, Zhao said.

Beijing, with 12 billionaires, was still China's top billionaire city, followed by Shenzhen with eight. Foshan in South China's Guangdong province and its five billionaires overtook Shanghai and Hong Kong, grabbing third place this year.