HARDtalk: Liu Xiaoming – Chinese Ambassador to the UK

The significance of the political unrest in Hong Kong stretches far beyond the borders of its territory; it poses President Xi Jin Ping with the most serious challenge of his presidency. If Beijing cannot quell the calls for freedom in Hong Kong, what does that tell us about the sustainability of its authoritarian rule elsewhere? Stephen Sackur speaks to China's Ambassador in London, Liu Xiaoming. His government faces mounting internal and external pressure; how will it respond?