Magnificent Butcher is a 1979 Hong Kong martial arts film directed by Yuen Woo-ping, and starring Sammo Hung, Kwan Tak-hing, Yuen Biao, Wei Pai, Lee Hoi San, Chiang Kam, Fan Mei Sheng, Fung Ging Man, Fung Hak-on and Max Lee.
The film is based on the story of Lam Sai-wing, one of the students of the legendary Chinese folk hero Wong Fei-hung. Sammo Hung plays "Butcher" Lam Sai-wing and Kwan Tak-hing plays Wong Fei-hung, a role he had played before in over 70 films. The film also features Hung's opera "brother" Yuen Biao as another of Wong Fei-hung's students, Leung Foon, a role he would reprise years later in the film Once Upon a Time in China along with Jet Li.
Magnificent Butcher was produced as Hung's attempt to duplicate the success of Jackie Chan's 1978 martial arts action comedy film Drunken Master, in which Chan plays Wong Fei-hung. Drunken Master heavily features the Beggar So character, who is also in Magnificent Butcher.
(Summary from Wikipedia)