This coin was minted in 1997 only, and commemorates Hong Kong's retrocession to China. I believe this coin circulated, or at least was in a position to circulate (at the time, 50 cent coins were in regular circulation in Hong Kong).
The Ox is a powerful animal and signifies the coming of spring and a new beginning.
All coin images in Daniel's Coin Zoo are from my personal collection. I collect, research, and personally photograph every coin displayed on this site. PLEASE do not take my images without permission. If you would like to use any coin image you see, just ask me. Thank you.