Also a kung fu cult classic film from the Shaw Brothers directed by Tang Chia.
The story:
Master Tit-kiu Sam (Ti Lung), the leader of the Ten Tigers of Canton, is the chief coach of China's militia. At that time, the opium ban was in use, but public sale of opium was widely available. Many bureaucrats were taking opium, a trend that Tit followed. As Tit takes opium, his physical skills were declining. Seeing how Tit's skills are declining, opium store owner Wing Fung (Chen Kuan-tai) challenges Tit to a public duel. Tit struggles to fight Wing and was in serious danger until his disciple Lo Kwa-sei (Robert Mak) steps in to rescue him before dying from his injuries. Seeing his disciple killed by Wing, Tit vows to seek revenge.
View the Official Trailer (https://vimeo.com/825613713) from the movie