The Secret Shaolin Kung-Fu (1979)

Beggars are being killed left and right to get their old leader to come out of hiding and face an old enemy. Meanwhile, young Wu Han Wei is being instructed by his blind grandfather to learn all six styles of the Butterfly technique. But when an old crazy beggar befriends the young student, his fate turns out to be intertwined with that of the fearsome Lu Din, a man with no arms or legs.