Rhetoric and sabre-rattling from mainland China are rapidly ramping up; we examine the risk of an invasion that would have global consequences. A decision by World Rugby to ban trans women from the women’s game stokes a notoriously ill-tempered debate. And listening to an album built entirely from the songs of endangered British birds.For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer
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