Reason: the word "late" is more important in late spring. That is, at the end of March of the lunar calendar, willows have blossomed and catkins cover the sky. Because there are too many catkins, the second sentence only says that "the willow people cover the door" and people close the door for fear that catkins will fly into the house.
At this time, the flowers are in full bloom and colorful, and butterflies are flying among them, so there is a saying that "butterflies fall with flowers". If spring is not going to pass, how can the flowers fall?
There is a poem to prove it: "The grass and the tree know that spring will come back soon, and all kinds of flowers are vying for Fang Fei. Huayang Jade Pod has no talent and thinking, but only solves the problem of flying snow. "
This poem should be a sentimental poem.
Facing the lively scene in late spring, the poet couldn't help thinking of himself, so he "tried to make friends" to see how many people played with him. But it's a pity that "Fang Jing laughs sparsely" and his friends are not around, which makes the laughter so sparse. The poet had to lean against the sunset in the west and sigh that this year's spring has passed and the spring of life will pass. I can't help thinking that life is in a hurry and things change.
This is my understanding and I hope it will help you.