Original title
黑三角
Released
1/1/1977
Origin country
CN
Genre
Action, Thriller
Production companies
Beijing Film Studio, Ningxia Film Group
Budget
—
Revenue
—
Runtime
1hr 29min
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.
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