There are two opinions about this poem: one is to mourn Xu Zhimo, and the other is to write for the birth of his son to express his hope for his son and the joy brought by his birth.
Extended data:
Mr. Liang Congjie, Lin's son, said in "Suddenly April Day on Earth": "My father once told me that" You are April Day on Earth "was made for me by my mother in the joy after I was born, but my mother never told me about it herself.
"For the creative intention of this poem, Mr. Liang said very objectively. Therefore, on the one hand, this poem is a love poem, written for Xu Zhimo who is already in heaven.
On the other hand, Lin is a mother who has a strong maternal love for her children, and it is entirely possible to write such a lively poem for her children.
References:
Baidu Encyclopedia, you are an April day on earth.