![Visitors-attend-an-open-day-to-celebrate-National-Security-Education-Day-at-the-Hong-Kong-Police-College-in-Hong-Kong,-China](https://v7.cdnpk.net/videvo_files/video/partners1961/thumbnails/BB_4b5ceefe-c758-477f-b758-8d9e8c0d5d29_small.jpg)
Visitors attend an open day to celebrate National Security Education Day at the Hong Kong Police College in Hong Kong, China
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