What do you mean, when midnight strikes, iron trees and silver flowers send heroes?

At midnight, the night watchman rang the bell to see the hero off. The silver flower of cycad is a metaphor, expressing people's reverence and admiration for heroes, as firm as cycad and as brilliant as silver flower.

The "watchman" in this sentence refers to the old man who worked night shift in ancient times. He is responsible for knocking gongs to remind people of the time, and it is also a symbol of watching and guarding. "Cycad Cycad" is an idiom with rich cultural connotation and profound meaning, which is often used to describe unshakable faith and noble quality.

Generally speaking, this sentence expresses the admiration and farewell to the hero, and also entrusts people with their firm belief and pursuit of good things.