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A passenger tests Rokid AR glasses on a Hainan Airlines flight in China.

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BEIJING — Hainan Airlines this week began allowing passengers on some routes to use Rokid’s augmented reality glasses for free for in-flight entertainment, the tech startup announced Thursday.

Chinese startup Rokid has claimed that for the first time, AR glasses – which allow you to superimpose computer-generated images into the real world – are being widely used on flights. Passengers can watch 3D movies, read e-books and play simple games using glasses on the built-in monitor.