The Hong Kong Museum of Coastal Defence, the Hong Kong Adventure Corps, the Hong Kong Air Cadet Corps and the Hong Kong Sea Cadet Corps are inviting students to join their 'Flag-Raising Ceremony on National Day' to be held on October 1. Prior registration is required for this event, which is run free of charge on a first-come, first-served basis. The deadline for applications is next Monday. For enquiries, call 2569 1429.