This sentence comes from:
Butterflies in Love with Flowers and Chanting Cicadas
The lush green leaves are red and spring is old, the afternoon is quiet and the court is leisurely, but this gentleman has a good voice. The fluttering of wings makes noise in the ears for no reason, and the high position makes one's body straighten. The marrow-sucking meal is fat at night, the belly is protruding and the clothes are fresh, and I still like to play high-profile. Thanks to the heavy shade, I have been able to avoid the wind blowing from the sky several times.
This poem praises the cicada.
The meaning of the first sentence is: The green leaves are luxuriant, the red flowers have withered, and spring has gone.
What I want to express is that spring is over and summer has arrived.