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Last weekend in Hong Kong, metro stations were torched, the Chinese state news agency was attacked, police fired water cannon and tear gas, and 200 people were arrested. That is Hong Kong's new normal. How long can it go on without a major intervention from Beijing? Is there any way out of the impasse between Hong Kong’s government and pro-democracy protestors? Stephen Sackur interviews former senior official in the territory’s administration, Anthony Cheung. Are Hong Kong’s prospects bleak?