

The Public Security Bureau intercept a telegram notifying foreign agents to retrieve the "110 secret". Shi Yan, head of the Reconnaissance Section, starts a campaign of…
Thriller, Action • Movie • 1977 • 1h 29m
Starring: Lei Ming, Ling Yuan, Liu Jia
Director: Chen Fangqian, Liu Chunlin
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Three Black Triangles
The Public Security Bureau intercept a telegram notifying foreign agents to retrieve the "110 secret". Shi Yan, head of the Reconnaissance Section, starts a campaign of counter-espionage, but one of his agents is soon killed on board a train.
Thriller, Action • Movie • 1977