With the enactment of Hong Kong’s national security law on June 30, 2020, acts of collusion with foreign countries to endanger national security, secession, subversion and terrorist activity were criminalised. As discussed at a recent forum to mark the law’s fifth anniversary, the “one country, two systems” policy has operated smoothly since. The national security law has been applied throughout with great restraint by the authorities, with prosecutions only resulting when absolutely...