Sorry Mr.Ciakmull!! I failed you...
I have deciphered the chinese title:
香港屠夫
which means, exactly, "Hong Kong Butcher"...
But I have not found nothing in the Web related to it. Maybe was a movie made for TV? (this film does not appear in his site
http://www.geocities.com/hkmovies168/jefflau.htm )
What a pity, because I like to add in the Db rare films as yours...
I'm afraid we will have to wait to somebody with a better copy...