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It presented a kind of calmness in the face of Trump, giving off a vibe along the lines of: do your best Washington, this is China and we're not interested in your nonsense.

That sense of experiencing something special for the first time is part of the key to the event’s success, giving off an energy of invention and revelation.

Mr Elias said: "Once he turns away from you and gets into the vehicle he doesn't give off any threat."

Ministers want to give off a sense of demonstrable toughness, visible muscularity.

He's giving off so much "divorced guy" energy — think Ben Affleck or Kanye West — that social media platforms are abuzz with speculation that Zuckerberg's wife, who he met in college, has left him.