The government says all its staff will observe three minutes of silence during the memorial service for former president Jiang Zemin on Tuesday.
“To express our deep condolences to President Jiang, the Hong Kong Special Administrative Region Government and members of the public will mourn with Mainland compatriots together,” a government spokesman said in a statement.
He says RTHK will arrange live TV broadcast of the memorial service to the public. It will also be broadcast live at the government headquarters in Tamar.
All 18 district offices will make arrangements for members of the public to watch the event live and observe mourning in silence at designated locations, which will be announced later.
All government vessels will conduct three minutes' honk during the mourning in silence.
The weekly Executive Council meeting will be held after the end of the service, but the media session will be suspended.
Also on Tuesday, national and regional flags at all government departments will be flown at half-staff, and officials will not attend any public entertainment activities.
All entertainment and celebration activities organised or funded by the government will be postponed or cancelled, and officials appealed to industry associations and organisations to postpone or cancel any entertainment or celebration activities scheduled for the day.
Jiang's memorial service will be held at the Great Hall of the People in Beijing at 10am on Tuesday.