Plants germinate, come and go, multiply, disappear, wither, snow carries the road, grass grows and warblers fly, rustle, plants grow and wither.

After beginning of spring, the earth gradually woke up from a deep sleep. Snow and ice melted, vegetation sprouted, and all kinds of flowers bloomed for the first time. Two months later, the swallow returned lightly. Soon, the cuckoo also came. So it becomes a hot summer, that is, the period when plants breed fruits. In autumn, when the fruits are ripe, the leaves of plants gradually turn yellow and fall in the autumn wind. The geese flew south, and the insects active in the fields and grass disappeared. Everywhere I go, I see a scene of falling grass, ready to meet the snowy winter. In the temperate and subtropical regions of the earth, this is the case year after year, and it goes on and on. For thousands of years, working people have paid attention to the relationship between natural phenomena such as the rise and fall of vegetation and the coming and going of migratory birds and the climate, and arranged farming accordingly. Apricot blossoms are in full bloom, as if nature is preaching to cultivate the land quickly; Peach blossoms are blooming, which seems to imply that we should plant millet quickly. The cuckoo began to sing, and the working people understood what it was singing: "Grandparents, cut wheat and transplant rice." In this way, flowers and birds sing, grass grows and warblers fly, all of which are the languages of nature.