The Hong Kong Blind Union provides some background information on the Braille system and explains how it works.
Click to watch the Introduction to Braille by the Hong Kong Blind Union.
To know more about the inventor of Braille, Louis Braille, and his story, watch this BBC video.
If you would like some tips on how to interact people with visual impairment, check out the advice given by the Hong Kong Blind Union.
Watch this video to find out the best way to assist people with visual impairment.