Commander Lucy D'Orsi meets the Queen
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Queen reflects on Chinese state visit

10 May 2016 Last updated at 22:15 BST

The Chinese President Xi Jinping's state visit last October was the topic of conversation when the Queen met a senior police officer, Commander Lucy D'Orsi.

Commander D'Orsi told the Queen it had been quite a testing time for her.

The conversation took place during a garden party at Buckingham Palace to celebrate the Queen's 90th birthday.