What does it mean that the grass grows long and the warbler flies in February and the willow is drunk and the spring is drunk?

In February, the grass grows and the willows are drunk with spring smoke, meaning: the weather is good in early spring and February, and the spring grass grows and the birds fly. Spring smoke is like fog and yarn, and wicker is green and drunk. "The grass grows in February, and the willow on the shore is drunk with spring smoke", which comes from "Village Residence" written by Gao Ding in the Qing Dynasty, meaning "In February of the lunar calendar, the grass gradually germinates and grows, the orioles fly around, and the willow on the shore is drunk with spring fog." . Gao Ding lived in seclusion in the southern countryside and felt the pastoral scenery in early spring and February. He improvised this poem, expressing his love for rural life and infinite yearning for nature. "In February, the grass grows and the warbler flies", in the words of Qiu Chi and Chen Bo's book, "In late spring and March, the grass grows in the south of the Yangtze River and the peanut tree warbler flies". Flying kites is a unique way for children to express their love for spring, and it is also a vivid response to the beautiful scenery in February. The whole poem is famous, and it is a masterpiece in early February and spring.