The phoenix tree announcing autumn is related to the fact that one leaf knows autumn.
In ancient times, sycamore trees were planted in the palace. When the beginning of autumn comes, the sycamore leaves will fall off. People know that it is already autumn. The ancients were very wise to observe the weather through natural phenomena. Even now, the leaves will wither and fall in autumn, so there is an idiom that one leaf knows autumn.
The detailed introduction is as follows:
A sycamore leaf announces autumn, and the rice fields promise a good harvest. Although it is not the height of summer, there are still tigers crouching, and there are even more chilling cicadas singing endlessly. The leaves are falling in the autumn wind and the sycamore trees are raindrops. In the golden autumn season, various crops are growing vigorously. Farmers are discussing this year's harvest in the rice fields. It's early autumn, and the weather has not yet cooled down. You can still hear the sound of cicadas just like in summer, and the hotter the weather, the louder the sound.
As follows:
The author fully analyzes the changes in weather and environment during the Beginning of Autumn. The Beginning of Autumn is the thirteenth of the twenty-four solar terms in the lunar calendar. Autumn means the end of summer and cool weather. Come. Beginning of Autumn is the first solar term of autumn, marking the official start of Mengqiu season. At the beginning of autumn, the sycamore trees begin to lose their leaves, hence the poem "A sycamore leaf announces autumn".
This poem describes the scene of autumn. The falling of sycamore leaves announces the arrival of autumn, and the harvest rice fields are filled with the joy of harvest. Although the weather has not cooled yet, you can already feel the scent of autumn, which is enhanced by the constant chirping of cicadas. The entire poem expresses the author's celebration of the autumn harvest and appreciation of the natural world.
More explanations are as follows:
A seven-character quatrain poem describing the 13th of the 24 solar terms in the lunar calendar, written by Zuo Heshui. The poem adopts a realistic technique, with just four sentences and 28 words, describing the scene of autumn when the leaves of the sycamore tree are just falling; farmers are walking on the path among the rice fields, commenting happily on the promising rice harvest.
It expresses the scene that although autumn has begun, there is still "autumn tiger" in the climate and there are still cicadas singing on the trees. After the work was published, it was also cited by articles on China.com and other websites. This custom has been passed down to future generations, so there is also the saying that the phoenix tree announces autumn.