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A pat on the back, ties in matching purple, a three-course state dinner and an ocean of handshakes and smiles: the vibes between Chinese President Xi Jinping and US President Donald Trump at the White House last week couldn’t have been better.

Beyond the widely covered 479-member military display, genuine chemistry played out in the quieter moments: Trump giving Xi a tour of his White House projects and light moments such as Trump calling Xi an “expert on stone”.