《I Know Who You Are》directed by Feng Xiaogang, adapted from the classic work《No Regrets Tracking》.The story takes place in Courtyard No. 15 in a Beijing Hutong. Xiao Dali, a grassroots policeman, and Feng Jingbo, an undercover agent, become neighbors who never see each other when they raise their heads.One shoulders the responsibility of tracing, and the other carries a secret identity. The two observe, test, and compete with each other in daily fireworks, turning a spy war into a half-life neighborhood game.

The most special thing about the film is that it does not turn the spy story into a simple shootout and pursuit.Xiao Dali and Feng Jingbo live in the same courtyard. Their children will grow up together and their families will take care of each other. Dinner tables, weddings, alley entrances and parents' quarrels have all become scenes of secret confrontation.On the surface, they are neighbors, but in their hearts there is always an unexplainable layer of doubt about their identities.As time goes by, this relationship becomes more complicated: they are both rivals, and they also become the people who know each other best over the years.

Xiao Dali, played by Lei Jiayin, is stubborn, simple and accepts death.He is not a detective, but a grassroots policeman who has been guarding one thing for his entire life.Feng Jingbo, played by Hu Ge, is more like a person trapped by his identity. In the first half of his life, he tried hard to disguise himself as an ordinary good person, but in the second half of his life, he longed to be truly regarded as a good person.The tension of the film comes from the long-term pull between these two people: doubts, temptations, anger, fatigue, habits and a certain understanding that is difficult to admit, all compressed in many years of getting along.

Feng Xiaogang puts the sense of age and human touch before genre stories.Courtyard No. 15 is not a cold spy war stage, but a living space with neighborly relationships, husband-wife relationships, father-daughter relationships, and changes in the times.Actors such as Zhang Yao, Chu Ni, Liu Peiqi, and Liang Jie took on the family line and group portrait line, making this pursuit not only belong to two men, but also affect the lives of two families.Precisely because the characters' lives are concrete enough, the pain caused by the truth about their identity is even greater.

《I Know Who You Are》Suitable for audiences who like period dramas, espionage suspense and opposite actors.It talks about “I Know Who You Are”, but the real focus is whether a person can keep his responsibilities, whether he can get rid of disguise, and how ordinary people are pushed by fate in the tide of the times.The long confrontation was wrapped up in alley fireworks. As time went by, the audience felt that this pursuit was not just a task, but also a fate that the two people could not avoid in their lives.