“Triangle,” 铁三角 helmed by three of Hong Kong’s best-known directors, Johnnie To, Tsui Hark and Ringo Lam — action directors who started their careers together at free-to-air broadcaster Television Broadcasts 30 years ago — have filmed 30 minutes each for the Milkyway-produced thriller.

The $5 million film was submitted for consideration at Cannes Film Festival.

Cast includes Louis Koo (”Election”), Simon Yam (”Exiled”), Sun Honglei (”Seven Swords”) and Kelly Lin (”Fulltime Killer,” “After This Our Exile”).

The three agreed on very basic rules: segments of 30 minutes each, one seamless story and each director writes his script after he sees what was produced before him — whether a script or film.

Because it was Tsui’s concept, he had the honor of going first, To said. Lam followed, and To finished the story.

Each helmer has his own writers, but all the segments will have the same editor, cinematographer and music for the sake of uniformity.

David Richardson is editor, Guy Zerafa is handling music and Cheng Siu-keung is cinematographer. All three worked on “Exiled.”

Yau Nai-hoi (”Eye in the Sky”) was the writer for To’s segment; Sharon Chung, a novelist who had never written a script before, penned for Lam; and Kenny Kan wrote for Tsui.

Story concerns three desperate friends who are given an opportunity to find buried treasure by a mysterious stranger.

The movie has been re-named from “Jigsaw” to “Iron Triangle” to the current “Triangle.”

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