Chinese president Xi Jinping hailed Beijing’s “one country, two systems” formula of governance for Hong Kong during the 25th anniversary celebrations of the city’s handover from Britain.During his first trip to non-mainland China, Mr Xi led the celebrations on Friday following the swearing-in ceremony of the city’s new leader John Lee.Hong Kong, a former British colony, was returned to China on 1 July 1997, with Beijing promising wide-ranging autonomy, unfettered individual rights and judicial independence at least until 2047.Critics have accused Mr Xi of ruling Hong Kong with an iron fist by throttling dissent and imposing the draconian national...