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 type of submarine was pursued by Taiwanese agents while passing through Hong Kong, narrowly escaping death. The Beijing counter-intelligence bureau immediately analyzed the situation, determined that there were Taiwanese spies within our ranks, and quickly launched an investigation. A three-person team was formed consisting of Xu Zifeng, who was originally planning to retire, young counter-intelligence officer Luo Zhan, and former Hong Kong foreign staff member Lan Meiqin, who accepted this task.