LONDON, UNITED KINGDOM - OCTOBER 20:  Camilla, Duchess of Cornwall (L) and wife of Chinese President Peng Liyuan (R), walk together as they leave the Mandarin Oriental hotel on October 20, 2015 in London, England. The President of the Peoples Republic of China, Mr Xi Jinping and his wife, Madame Peng Liyuan, are paying a State Visit to the United Kingdom as guests of The Queen.  They will stay at Buckingham Palace and undertake engagements in London and Manchester. The last state visit paid by a Chinese President to the UK was Hu Jintao in 2005.  (Photo by Justin Tallis - WPA Pool/Getty Images)