During that time, Liu Jianming had actually suffered from schizophrenia. After listening to the recording stolen from Yang Jinrong's office (I think the content of the recording was the conversation between Han Chen and Liu Jianming), he was on the verge of a nervous breakdown, because no matter what, he He can no longer be a good person, although he wants to be a good person. So the schizophrenia relapsed, and he took the recording box to arrest Yang Jinrong, because he thought he was a good person, a policeman, and he firmly believed that Yang Jinrong was an insider (this is why he investigated Yang Jinrong privately). At that time, he did not I think I am Liu Jianming, so there is that scene in the later movie. And Yang Jinrong also knew that the content of the tape in Liu Jianming's tape recorder was the conversation between Liu Jianming and Han Chen, so he asked, "Officer Liu, do you know what you are doing?"
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