Silent Oath

This film (drama)Also known as誓言无声，is aMainland ChinaProducerbeauty live，At2002Released in year 。The dialogue language isMandarin Chinese，Current Douban rating8.6(For reference only)。

In a winter of the 1960s, a Chinese expert secretly returning to participate in the research and manufacturing of our new submarine was chased by Taiwanese spies while passing through Hong Kong, nearly losing his life. The Beijing Counterintelligence Bureau immediately analyzed the situation, concluded that there were Taiwanese spies within our ranks, and quickly launched an investigation. A three-member team was formed, consisting of Xu Zifeng, who was about to retire, young counterintelligence officer Luo Zhan, and Lan Meiqin, who was originally stationed in Hong Kong, to take on this task.