China is poised to test a thorium-powered nuclear reactor in September, the world’s first since 1969. The theory is that this new molten-salt technology will be “safer” and “greener” than regular uranium reactors, and so could help Beijing meet its climate goals. Yet is the country's investment in this also geostrategic? A new page in the history of nuclear energy could be written this September, in the middle of the Gobi Desert, in the north of China . At the end of August, Beijing announced that it had completed the construction of its first thorium-fuelled molten-salt nuclear reactor , with…