Ask for a movie, the story is set in Beijing. There was a scene where the criminal was taken to the police station and had a strange conversation with police officer Kan Kan.

Plainclothes policeman Lao Zhang (Zhang Lixian) and a group of brothers drank heartily on the wine table and expressed the bitterness and sweetness of Beijing with songs. They lurk in an endless stream of people, waiting for an opportunity to catch criminals: whether they use electronic interference to steal car lock property, or use disabled people as bait to touch porcelain, whether they form a gang of gentlemen on the beam or swindle fortune tellers ... they can't escape Lao Zhang's eyes. Lao Zhang's deeds even made a documentary on Beijing TV. However, seeing the criminals arrested one by one, Lao Zhang's heart was also messed up. He is also an ordinary person with old age and small age. After years of hard work, Lao Zhang's body also lit up with a red light. He has asthma and diabetes, but in order to catch thieves, he tries to overcome his own difficulties. However, there is always a stalker in front of his house, and many bizarre events have happened one after another, which caught Lao Zhang and his brothers off guard ... [1]