In the play, the identity of Liu Jianjun Longtu surfaced. Yi ran got a serious illness when he was a child and needed 200,000 yuan for surgery. Jin-fa Chen lend a helping hand, help Yi Ran have an operation, and pull Liu Jianjun into the thief boat. In the Zhang zhen case, Liu Jianjun took advantage of his position to conceal important clues, resulting in the death of the deceased without telling witnesses, and the conclusion was perfunctory.

Liu Jianjun hid the guns involved in the' 66 gun case, perhaps because he still had a trace of justice in his heart and knew the forces behind Chen Jinfa, so he targeted Chen Jinhui (the murderer of the' 66 gun case) and created a small Swiss gun shooting case. The purpose is to frame Chen Jinhui and bring him to justice.

Introduction to Liu Jianjun:

Liu Jianjun is the master of Wu Jian and Yuan Gang. When Wen Luyang doubted Yuan Gang's identity, Deputy Director Liu asserted that Yuan Gang could not be such a person. He also insisted that Yuan Gang and Wu Jian were his favorite young people.