What does it mean that there is no mud on the sand road between the blue bud and the pine tree below the mountain?

The bluegrass by the stream at the foot of the mountain just sprouted and soaked in the stream. After the spring rain, the sandy path between pine trees is clean and mud-free. It is dusk, and the cuckoo in the pine forest is singing in the drizzle. Under the mountain, the blue buds are short immersed in the stream, and the sand road between the pines is clean and mud-free. The cuckoo bird in Mix is called from Su Shi's "Qingquan Temple", which means the bluegrass at the foot of the mountain has just sprouted and soaked in the stream. After the spring rain, the sandy path between pine trees is clean and mud-free. As the sun sets, cuckoos in the pine forest crow in the drizzle. The whole poem is about swimming in Qingquan Temple. The temple is near Lanxi, and the stream flows westward. Under the mountain, the blue buds are short immersed in the stream, and the sand road between the pines is clean and mud-free. At dusk, the rain is whispering. Who says life can't go back to adolescence? The water in front of the door can also flow west! Don't bemoan the passage of old age!