This is a poem that describes a very beautiful scene. The general idea is:
The mirage, the sea, the falling stars and the rain, the sparkling trees and silver flowers never sleep in the sky.
The first half of the sentence "mirage, mirage, falling stars and rain" depicts an illusory and beautiful scene, which may refer to mirages and the spectacular scene of stars falling like rain. The second half of the sentence, "Fire trees and silver flowers never leave the sky" is used to describe a night with bright lights and bright fireworks, vividly expressing a warm, prosperous and bright feeling. The whole poem attempts to describe a breathtakingly beautiful scene, whether it is reality or illusion, it leaves a deep impression on people.