Beijing-Hong Kong operation may be first step in ‘complex national security case’

A joint operation by Beijing’s national security arm in Hong Kong and the city’s police could be the first step in an investigation into an unusually complex collusion case that is ultimately handed over to mainland Chinese authorities, observers have said.
The investigation is the first publicly known cooperation between the two sides and comes just weeks after the city passed legislation supplementing the domestic national security law aimed at allowing the Beijing office to better carry out…