The Crippled Masters (1979) [Blu-ray]

Originally released as, 'Tiān cán dì quē.' Two men, one who has lost both arms and the other who has lost both legs, seek revenge against the master who crippled them. Undergoing rigorous training and mastering their unique fighting styles the men encounter various challenges and adversaries. Along the way, they form a deep bond and develop innovative techniques that capitalize on their strengths.