To understand the final gun change, the difficulty is no less than a GRE logic problem (I think I'm thankful buddy, I also practiced it), not only involves the owner of each gun, the person killed, and various placement methods The hidden words and intentions behind it directly affect the understanding of the characters and the ending. When I watched it for the first time, I just thought it was unremarkable, but the more I watched it, the more frightened I became. Finally, I suddenly found out that the real ending was not filmed at all, but was all contained in this puzzle.
Before He Jiaan began to change the gun, Gao Zhiwei changed the bullet for his gun. After 6 shots were fired, the South Asian was shot 1, He 1, Chen 4.
The story of Gao Zhiwei's plan: Chen Guibin (with a South Asian) kills Wang Guozhu and commits a crime with a gun. The loot was unevenly distributed and the Nanyas were killed. Gao and He rushed to kill Nanyas and Chen. During the shootout, He was killed by the Nanyas with Wang Guozhu's gun. He got his gun back.
After some gunfights, the initial situation is as follows:
South Asians: Gao Zhiwei's gun. Not a single shot was fired.
Gao Zhiwei: Wang Guozhu's gun. Kill the depositor, store clerk, South Asian, Chen, and hurt him.
Chen Guibin: He Jiaan's gun. Kill Gao Zhiwei.
He Jiaan: Qiqi's gun killed Chen Guibin.
The first gun change:
Take back the gun in Chen Guibin's hand (kill Gao Zhiwei).
Call GG to justify shooting. Open South Asian handcuffs.
Gao Zhiwei's gun in the South Asian hands to Chen Guibin (not fired).
Gao Zhiwei handed Wang Guozhu's gun to the South Asians (kill the deposit clerk, store clerk, South Asian, Chen, and hurt He).
Story: He, Gao, Chen, and Qiqi came to arrest the South Asians who seized Wang Guozhu. The South Asians killed Chen and injured He.
Intent: To sacrifice South Asians to preserve the reputation of the police force.
Weaknesses: Why did He Jiaan kill Gao Zhiwei? Why do South Asians kill themselves? Why did Kiki kill Chen?
Second gun change:
Put the gun of Wang Guozhu in Gao Zhiwei's hand into Chen's hand (kill the depositor, store clerk, South Asian, Chen, and hurt He).
Gao Zhiwei gave Gao Zhiwei's gun in the hands of the South Asian (not a single bullet was fired).
Story: Chen Guibin seized Wang Guobin's gun case, and accompanied the South Asians, He Jiaan and Gao Zhiwei Qiqi arrived, Chen killed the South Asians, injured He, and Qiqi killed Chen Guibin.
Intent: To sacrifice the madman Chen Guibin to save himself and Gao Zhiwei.
Weaknesses: Why did Chen kill himself? Why did He Jiaan kill Gao Zhiwei?
The third gun change:
Gao Zhiwei's gun in the hands of the South Asians was returned to the South Asians (not a single bullet was fired).
Story: It was the South Asians who took Gao Zhiwei's gun, and Chen Guibin took the gun case of Wang Guozhu. He Jiaan, Gao Zhiwei and Qiqi arrived, Chen killed the South Asians, injured He, and Qiqi killed Chen Guibin.
Intent: To sacrifice the madman Chen Guibin, Gao Zhiwei was guilty of missing a gun to save himself.
Weaknesses: the same. And the two gun robbery cases are even more difficult to convince.
Until the screen gets dark, the gun change is still not over. However, we can already see from the above analysis that if we put away He's own gun and Kiki's gun, no matter how the other guns are placed, it will not hold. 5 people and 4 guns are not a problem, because Chen Guibin should have no guns. The key is why He Jiaan's gun killed Gao Zhiwei. Why did Qiqi's gun kill Chen Guibin?
So we can infer He Jiaan's only and most favorable ending: in the end, Gao Zhiwei must be a bad person, and one of Qiqi and Chen Guibin must be an accomplice and the other a good person.
If 1, Qiqi is a good person and Chen is an accomplice. Can't explain why Gao killed Chen.
If 2, Chen is a good person and Qiqi is an accomplice. As long as Qiqi comes, returns the gun to her, and kills Qiqi with He Jiaan's gun, it is a righteous killing of relatives. Can't use Gao or Wang's guns, because they are all in the hands of experts, and the logic of shooting is not logical.
The final plan should be:
He Jiaan: He Jiaan's gun (kill Gao).
Kiki: Kiki's gun (kill Chen).
Gao Zhiwei: Gao's gun (not fired a single bullet), Wang's gun (killed the depositor, store clerk, South Asian, Chen, injured He).
So there is only one final outcome, and that is the story told by He Jiaan:
Gao Zhiwei teamed up with Qiqi to win the king's gun crime, He Jiaan and Chen Guibin arrived with the South Asian people's information, and killed the South Asians and Chen. Kiki also shot Chen. He killed Gao and Qiqi himself.
In the above deduction, I ruled out the factor of "infighting", otherwise, the South Asians can also be counted as Gao and Qiqi, and let him take a gun. But it doesn't matter, the key is to meet the two conditions of "Gao Zhiwei is a bad person" and "Qiqi and Chen Guibin are good and bad".
This is the final outcome. It can be seen that the process of constantly changing guns is the process of He Jiaan's gradual infatuation, from protecting the police force, to protecting himself and Qiqi, and then sacrificing everyone to protect himself. He Jiaan's inner demon became stronger and stronger, his evil personality became more and more prominent, and finally he became another Gao Zhiwei. The look of resentment and despair in the detective's eyes was precisely because he saw that the person he sacrificed to save had completely fallen into a devil.
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