There will be a strong police presence in the vicinity of the Convention and Exhibition Centre in Wan Chai - where top officials and other dignitaries will attend a flag-raising ceremony and a reception on Friday morning.
Roads around the venue have been closed off. For more information, click here.
Police sources said their elite units, including the so-called "raptor squad" as well as the counter terrorism response unit, will conduct "high-profile" patrols at what they described as "sensitive locations".
They added that the force will continue to conduct risk assessments and enhance officers' protective gear.
London has more public sculptures of animals than it does of women or people of color, a new study has revealed.