Hong Kong’s leader hopes mainland China would not impose a “too strict” circuit-breaker that would suspend future quarantine-free travel if Covid-19 infections emerged in the city. Speaking to the press before her weekly Executive Council meeting, Chief Executive Carrie Lam Cheng Yuet-ngor said the long-running talks to reopen the border were “progressing well”, but called the suspension mechanism a “core” issue that would have to be resolved.…