4. The China Satellite Navigation Office plans to position two more Beidou satellites into the geostationary orbit in the first half of 2020 to finish the deployment of all of Beidou's space-based assets. Beidou is one of the world's four space-based navigation networks, along with the United States' GPS, Russia's GLONASS and the European Union's Galileo. Currently, there are 46 Beidou satellites in service.

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