I'm sure everyone remembers this Shaw brothers movie. Here's some trivia on where the 5 poison story originated. The popular writer Jin Yong first wrote Crimson Blood Sword(or something like that).The setting is a few years before the Ming dynasty fell. The 5 poison cult was a group that was made of the Miao minority. The 5 animals were the main animal symbols of the cult. Scorpion, spider....you know the rest. I can't really remember if the story involved characters actually performing martial arts based on each of the 5 but the 5 poisonous animal martial art styles were mentioned in the novel. The golden snake sword style is used together with the golden snake sword and the golden snake projectiles.But the movie doesn't have this .Anyway, the movie is just borrowing the 5 poison cult for a storyline and expanded on it. The 5 characters using each individual style could be Chinese when you look at their clothing and hairstyle but since their real names are never mentioned they could Miao.