What does this poem mean if bananas don't show lilac knots and the spring breeze is in the same direction?

The meaning of this poem is: the banana heart has not yet unfolded, and the bud of lilac is still in bud; Two lovers are in different places, and they are both sad because of the departure of the spring breeze.

Source: Tang Shangyin's Two Get One Free

Original poem:

Upstairs, I want to rest at dusk, and the jade ladder is like a hook.

Banana hearts don't show lilac's frustration, but they are also sad about the spring breeze.

Translation:

At dusk, a woman climbed a tall building, trying to look into the distance, but afraid that the boundless dusk would touch melancholy. The jade ladder is horizontal, and there is a crescent moon in the sky, sprinkling a faint radiance. The banana's heart has not yet unfolded, and the clove bud is still in bud; Two lovers are in different places, and they are both sad because of the departure of the spring breeze.

Extended data:

"Poetry is based on emotion" is the traditional poetic proposition of China's classical poetry, which mainly focuses on emotional catharsis, and Li Shangyin in the late Tang Dynasty is no exception. His love poems are ingenious and affectionate. The poem "A Gift" empathizes with the scenery and expresses the homesickness of the boudoir to the fullest. The first sentence "I want to rest at dusk upstairs" is a short seven-word description of women's ambivalence. Here, I saw the woman's worry about lovesickness.

Two or three sentences describe the scenery, which is ruthless, but people have feelings, so the scenery is full of feelings. "The jade ladder is absolutely horizontal, the crescent moon is like a hook, and the unexpanded plantains and budding cloves are as full of sorrow as themselves!" Sadness is invisible. The poet shaped it and vividly wrote a woman's full of sadness with bananas and lilacs. The last sentence, "The spring breeze in the same direction cares about each other", directly points out the main idea, and tells the overwhelming story of thinking of women, and a deep sadness comes to my face.