What kind of spring did Zhang, a member of the Ministry of Water Resources, describe in early spring? Is "near but nothing" contradictory to the whole poem? (Exploring the difficulties in poetry)

In early spring and February, in the north, when there is still ice on the treetops and under the eaves, where is spring? Not even a shadow. But if it rains a little, the next day, you see, spring is coming. The foot of the rain in walk on by left the mark of spring, that is, the grass buds in early spring appeared. From a distance, it seems that there is a very pale green, which is the grass color in early spring. Watching, people's hearts are suddenly filled with happy business. However, when you look closely with infinite joy, the ground is sparse and extremely slender buds, but you can't see what color it is. The poet, like a talented ink painter, waved his wonderful pen full of water, vaguely emitting a hint of green, which is the grass color in early spring. From a distance, there are no more images, but when you get closer, you can't see them. This sentence "grass seems to be near, but it is not", which can be said that it is suitable for both far and near and vivid in the air. The background of this color setting is a slender light rain falling on Tianjie (the street in the imperial city). Seeing the grass color through the rain adds a hazy beauty to the grass color in early spring. And the light rain is as wet as crisp. Crispy is cream. With such nutrients, can grass not be new? With such a background, can grass be beautiful? As we approached, the poet also made a comparison: "It is definitely better than the smoke willow in the Imperial Capital". The poet thinks that the color of early spring grass is many times better than the scenery of smoke and willow everywhere in the city. Because the grass color of "looking far but not near" is unique in early spring, it is fresh and moist, symbolizing the rejuvenation of the earth and the prosperity of Vientiane business. Where's the willow? It's time for a "willow pile of smoke", not to mention a "full" city, which is not rare.