The Magnificent Ruffians (1979)

Yuan Ying Fei is the descendant of the one known as Golden Sword and himself is a master of the technique as well as being boss of the town. He is so a cruel man and has killed his sparring partners with unnecessary blows, causing many martial artists to leave the town with only Guan Ah Yun remaining. Guan is the owner of Wu Wei security bureau which Yuan wishes to buy but cannot bully Guan out as he has an eye for his sister and Guan cannot fight back because any time he tries his sister and mother stop him. Yuan is stuck until he learns of 4 kung fu experts who are passing through the town by eating in restaurants and then taking it in terms to take a beating due to not being able to pay. Yuan tricks He Fei,Yang Zhui Feng, Zeng Qiao and Feng Jia Ji into being his friends and then tricks them into believing that Guan is a cruel and unhelpful man. The four go to fight Guan, but do so away from his mother and sister - but the fights produce mutual respect and friendship between sparring which leads Yuan to more deadly deception.