What is the purpose of writing about the sun and clouds in Ah Cheng's novel so many times?

Ah-Cheng's novels had mentioned many times that the sun and clouds often had many meanings and symbols. First of all, the sun and clouds were usually seen as symbols of nature, representing vitality, energy, and freedom. In novels, the sun and clouds are often used to describe the protagonist's mental or physical state. For example, when the protagonist bathes in the sun, it can imply that his vitality has been restored and supplemented, and also express his desire for freedom. Secondly, the sun and clouds also symbolized change and movement. In the novel, the movement of the sun and clouds could represent the passage of time and the ups and downs of life. For example, when the protagonist was taking a bath, the sun and clouds moving in the sky could imply that he was experiencing a turning point in time or that he was experiencing a change in his life. Finally, the sun and clouds were often used to show the insignificance of human beings and the power of nature. In the novel, the sun and clouds could be regarded as symbols of nature, representing the insignificance of human beings compared to the natural world, and also expressing the awe and respect of human beings to nature. For example, when the protagonist is taking a bath and sees the sun and clouds in the sky, it can remind him that human beings are only a part of the natural world and that the power of nature cannot be completely defeated. To sum up, the sun and clouds in A-Cheng's novel had many meanings and symbols, representing vitality, energy and freedom, the passage of time and the ups and downs of life, the insignificance of human beings and the power of nature. These meanings and symbols all helped to enrich and deepen the theme and plot of the novel.