Finger Of Doom (1972)
The notes on the dvd suggest this film was made in 1971, and was the first film as director by Pao Hsueh-Li (who had served as cinematographer and co-directed with Chang Cheh previously). HKMDB reckons it's a 1972 film and not his first - not sure who's right. The film actually feels closer to one of Chor Yuen's early 80's wu-xia than anything else from the early 70's that I've seen. We have usual mysterious mad-person who seeks to dominate the martial arts world with her FINGER OF DOOM kung fu/poison/mind control combo (basically turns people into zombies), her sister who's out to stop her and a trio of kung fu brothers that want to retire from the Jiang Hu but get caught up in the plot. The story isn't the tightest, but the direction from Pao Hsueh Li is superb. He doubles as cinematographer, and utilises a lot of impressive and creative camerawork, which really brings the film to life.