What is the moral of the poem Haitang Huaxi?

It mainly expresses the author's feelings about the transience and impermanence of life, as well as his admiration and cherish of natural beauty. In the poem "Haitang Huaxi", it is the third day of the third lunar month. In front of the door, Haitang fell to the ground and dripped into West China. Haitang Huaxi is a poem created by Wu, a contemporary romantic poet.