This is another good martial arts movie from Golden Harvest's first year of production. I give all the credit to the action directors and some actors. Three action directors are listed. First there is Han Ying-Chieh. He is the big boss, really, from the Bruce Lee movie "The Big Boss" he played the big boss. Also listed is Sammo Hung who would have been a mere 19 years old at the time. I don't know who gets credit for the fight choregraphy for the blind old lady but that was a masterpiece. Her fight sequences had everything, action, fun, and it was believable.
Chang Yi started as an actor with no martial arts experience for Shaw Brothers and his first lead there was in "King Cat". Clearly this man was practicing martial arts diligently over the next four years. He has the moves and stance of someone of first degree black belt by this movie. Plus, he can do a forward flip as good as any stunt man.
Another excellent actor is Shih Chun who first appeared in "Dragon Inn". This actor was one of the best and I am always surprised that he acted in only 26 movies. He has a few lifetime achievement awards and the last information I can find on him concerns his attendance at Cannes. Otherwise, there is scant information about him. I can only surmise he was also excellent at money management and those 26 roles provided him with all he needed for a life of security and comfort.
My copy is a strange one and I can't recall how I got it. It is a computer file that plays on a HDTV as widescreen but it is really about 10% cut off on the left side. The subtitles are hard coded and the dialog is German.
This is the good stuff for fans of this genre. I rate it above average and it is on my list to watch again when appropriate. So far I have watched it twice.