Three Black Triangles

The film follows the Public Security Bureau as they intercept a telegram intended for foreign agents regarding the retrieval of a highly classified "110 secret." Shi Yan, the head of the Reconnaissance Section, leads a campaign against espionage efforts. As the plot unfolds, the stakes rise when one of his agents is murdered on a train, adding tension and urgency to the narrative.

With a mix of action and thriller elements, Three Black Triangles showcases the challenges faced by security forces during a time of heightened political tension. The film features performances from Lei Ming, Ling Yuan, Liu Jia, and several other actors, each contributing to the unfolding drama of espionage and investigation. This film fits well within the action-thriller genre from the late 1970s, appealing to collectors interested in international cinema and historical narratives.