Who says that those who stand in the light are heroes?
There are many photos interspersed in this song.
There are photos of Liu Xu when he went to the police academy.
There are photos of him training in the game.
There are photos of him performing a mission.
There are pictures of him undercover.
There are pictures of him dying after being tortured by drug dealers in the end.
These photos are connected together, just witnessing the growth, experience and greatness of a drug-killing hero who strives to defend the country and the peace and stability without hesitation.
The picture finally freezes at the moment when the drug-killing hero Liu Xu salutes and Zhang Chi returns a salute in his unstandard posture.
It seems that there is a certain belief passed down between them.
This scene is the best interpretation of one sentence. Chapter completed!