Meaning: When you see a fallen leaf, you know autumn is coming.

Meaning: The development trend and changes of things can be predicted from some subtle signs of things.

Pronunciation: yī yè zhī qiū

Source: "Huainanzi·Shuo Shan Xun": "Seeing a leaf falling means you know the end of the year (Translation: Seeing a leaf falling, I know it’s the end of the year again)”

Quotation: Tang Geng’s “Wen Lu” of the Song Dynasty quoted a poem from the Tang Dynasty: “The mountain monk cannot count the number of jiats, and one fallen leaf knows the autumn of the world (Translation: The monk in the mountain does not need to go). Look at the calendar and you will know autumn is coming when the leaves fall)."Extended information

Synonyms:

One leaf announces autumn? [yī yè bào qiū] Metaphorically, through individual subtle signs, You can see the development trend and results of the entire situation. Same as "One leaf knows autumn". < /p>

Knowing the slightest hint? [jiàn wēi zhī zhuó] When you see some signs of something, you can know its development trend.

Origin: Zheng Guanying's "Warning Words in the Prosperous Age: Annihilation of Soldiers": "Know the way of heaven from above, observe the sentiments of the people below, judge the past and the present, and know the smallest details. If you have some understanding, you can know the general direction from small things).

”