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Beidou is one of the four space-based navigation networks along with the United States’ GPS, Russia’s GLONASS and European Union’s Galileo.

Beijing started as an industrial base, but is shaking off its old image to become a science-savvy international metropolis

Before a scientist arrives, the institute will prepare his or her lab, complete the recruitment of a team of young colleagues and get their temporary housing ready, he said.

Behind the app is a 15,000-strong army of freelance destination planners. They work on mapping out schedules and itineraries, and are paid a fee for their efforts.

Before the ban introduced by China last year, the country received 45 percent of the world's plastic waste. Exporters are now straining the processing abilities of other Asian nations by sending them waste that previously would have gone to China.