Before talking about the meaning of the image of chilling, let's talk about what chilling is. Cicada is actually Qiu Chan. Our common sense tells us that cicadas actually only live in summer. It's cold in autumn, and cicadas are not far away. At this time, the cicada's cry is deep and sad, which makes people feel sad, so it is often used to create a sad atmosphere and express parting and sadness.
Speaking of chilling, the first poem we think of must be Liu Yong's Yulin Ling, "The chilling cries, the pavilion is late, and the shower begins to rest." Here, the cold is associated with the pavilion, which adds a feeling of sadness and expresses reluctance.
In Cao Zhi's Wang Biao for a White Horse, there is also a saying that "the autumn wind is cool, and cicadas sing on my side", which is generally inseparable from the sadness of parting.