
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.

Lei Ming
Shi Yan

Ling Yuan
Yu Huangshi

Liu Jia
Yu Qiulan

Ping Zhang
Hong



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黑三角
January 1, 1977
1h 29m
7.0
Chen Fangqian
Yingjie Li
2

Beijing Film Studio
CN
Ningxia Film Group
CN
Bi Jianchang
Lu Deqin

Qin Wen
Liu

Cao Cuifen
Cast

Zhang Yan
Cast

Fang Hui
Cast

Lin Li
Cast
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