That brass key always shines in the dark, like a piece of amber soaked in time. The arch marks on the handle were worn warm, but were embedded with the ashes of the fire in Qishui Town, hiding Uncle Chen's last breath between his fingers. It flashes in the laser net of the film library, stained with the blood of the violinist; it sinks in the dust of the old water tower, locking Zhou Zhengyang's unfinished words. Lu Xiao rubbed the mark, and suddenly saw twenty-seven years of fire pouring out of the keyhole, burning the memory. It turns out that there are some doors that require blood and bones as keys to pry open the dusty years.
Purpose: to use one's life to protect justice and convey the sacrificial spirit of conscience, ultimately pointing to the belief that "crimes will eventually be exposed, and the truth will never sink", implying the remembrance of historical scars and the hope for a bright new life.