只有太阳知道白天的亮只有月亮明白夜晚的黑
[zhĭ yŏu tài yáng zhī dào bái tiān de liàng zhĭ yŏu yuè liàng míng bái yè wăn de hēi]
This poetic nickname reflects a contemplative and introspective nature. It expresses the idea of solitude, where only the sun and moon truly understand day and night's essence, symbolizing the depths of loneliness.