The Queen described the first State visit by a Chinese Premier for 10 years as "a milestone in the unprecedented year of co-operation and friendship between the United Kingdom and China" as Prime Minister David Cameron and Chancellor of the Exchequer George Osborne pursue a policy of making Britain China's most important European trading partner. In turn, Xi urged his audience at Buckingham Palace to "seize the opportunity" to build a new era of prosperity.
It is only two years since China allowed Cameron in from the cold after a 14-month diplomatic deep freeze imposed as punishment for meeting the Dalai Lama, leader of the disputed territory of Tibet.
Introducing Xi in Parliament's royal gallery, the Speaker, John Bercow, made a reference to the recent visit of Aung San Suu Kyi, as an "international symbol of the innate human right of freedom".
When Prince Charles welcomed the Chinese leader to Britain at the Mandarin Oriental Hotel in London, Xi was smiling warmly in an official picture, while the Prince looked rather glum. No reporters were allowed to witness the meeting. Later, when the Queen and the Duke of Edinburgh posed with Xi and his wife Peng Liyuan on their way in to Buckingham Palace, the Prince of Wales stalked up the steps in the background, ignoring photographers and TV cameras.
They had travelled to Buckingham Palace in a carriage procession, Free Tibet protesters booing from the sidelines. Pro-China supporters countered them by playing the Chinese national anthem.