Shaolin and Wu Tang

The Hong Kong Martial Arts Movie of 1981 staring and directed by Gordon (Chia Hui) Liu. Also known as Shaolin vs Wu Tang in some of the early dubs.

Two best friends belong to rival kung fu factions. They are Chao Fung-Wu of Wu Tang sword style and Hung Jun-kit of the Shaolin boxing. Hung Jun-Kit has a sister, Yan-Ling, who has a crush on his best friend, Chao Fung-Wu. Each student, of course, has a master, and both masters are NOT aware that their respective students are best friends. It wouldn't be appropriate since their schools are bitter rivals. Wu-tang's founder was actually expelled from Shaolin!

So anyway, the two friends go out to drink and when one throws some thugs out of the brothel in which the friends are drinking, they both have a friendly sparring match to show off their Kung Fu.

The Manchu Prince hears of their sparring and remarks "The Shaolin and Wu Tang could be dangerous (if they merge their respective styles into a stronger kung fu)." He vows to learn both styles. He invites Hung Jun-Kit's (Shaolin) master over for dinner, but the master refuses to teach him. Worried about a similar reaction from Chao Fung-Wu's master, Master Law (or Lao) he begins a Xanatos Gambit to gain the secrets of both.

The film that inspired the name of Hip Hop group Wu-Tang Clan.

Tropes used in Shaolin and Wu Tang include:

Accidental Murder: Chao Fung-Wu kills his master, Master Law.
Awesomeness By Analysis: The Manchu Prince
Cyanide Pill: Master Law due to the poison impales himself on Chao Fung Wu's sword, after instructing him to do drills knowing where his sword would be so he can place himself there before anyone could stop him.
Cycle of Revenge: Definitely has that.
Died in Your Arms Tonight: Yan-ling attempted this with Chao Fung Wu but the Wu Tang pulled him away before she was completely dead.
"Get Out of Jail Free" Card: Manchu Prince lets everyone go at the end and the protagonists after beating are actually concerned with the level of injuries they gave him more then getting revenge.
Handsome Lech: Chao Fun Wu
Hard Work Montage: One for both schools.
Heel Face Revolving Door: Yue-lam
Hong Kong Dub: This film is quite interesting in that there are subtitles AND a dub. The subtitles seems to be somewhat direct translations and the dub is more creative. This troper REALLY likes having both. Nevertheless, the subtitles seems to be set in wide-screen while the movie is set in standard resolution. This means that the subtitles are often cut off.
Human Pincushion Yan-Ling at the hands of Manchu archers.
Idiot Ball: Chao-Fung Wu when the Manchu Prince and his attendant tell him that it was the Shaolin who poisoned his master and despite his master telling him not to give the Wu Tang teachings to the Manchu and Hung Jun-kit telling him, he believes it until the climax.
Just Between You and Me: The Manchu Prince during Chao Fung-Wu and Hung Jun-kit's battle after becoming the representatives for their individual styles grows tired of seeing them not go all out and begins explaining his plan to have the styles destroy each other and his own stolen knowledge of the two styles.
Katanas Are Just Better: Let me try my Wu-Tang style.
The Mole: The less crazy woman that helps Chao Fung Wu escape is actually Yue-lam, the Manchu Prince's sister.
Mood Whiplash: The abrupt ending.
Revenge Before Reason: Slightly subverted in that the two side don't fight to the death in the end of the film. The two protagonists turn on the big bad instead.
Took a Level in Badass: Although they were good to begin with, Chao Fung-Wu and Hung Jun-kit at the end definitely take a level or two at the end.