In the event that the Pre-No. 8 special announcement is made or the Tropical Cyclone Warning Signal No. 8 or above/Black Rainstorm Warning Signal is issued by the Hong Kong Observatory, which remains valid at 6:00 pm on 30 August, the "Gala Show by Mainland Olympians" will be cancelled. In the event that such a special announcement or such a weather warning signal remains valid at 7:30 am on 31 August, the"Sports Demonstrations by Mainland Olympians" will be cancelled as well.