The Chinese president, Xi Jinping, has presided over Hong Kong’s biggest military parade since the British handover in a tub-thumping show of strength that observers said was intended to intimidate members of the former colony’s nascent independence movement . More than 3,100 troops gathered at the Shek Kong military base near Hong Kong’s border with mainland China on Friday morning to stage the review for Xi, who is on a rare tour of the city to celebrate the 20th anniversary of the the former British colony’s return to Chinese control on 1 July.