The source of Longevity Over Nanshan is China's first collection of poems, The Book of Songs. There is a natural forest in Xiaoya in The Book of Songs, which is full of prayers.
In this article, nine metaphors are used successively. They are: like mountains, like hills, like hills, like tombs, like rivers, like the moon, like the rising sun, like the longevity of Nanshan, like the lush pines and cypresses. This is the famous "nature protection", and "Like the longevity of Nanshan" is the place where "Longevity is better than Nanshan" was published.
Tianbao in Xiaoya is a poem sung by courtiers in praise of the monarch. After Zhou, the rulers of Zhou believed that their regime was arranged by heaven. In view of the lessons of the demise of Yin Shang, they "feared the power of heaven" and "respected the destiny of heaven" and pursued the policy of serving people with virtue, which made the country increasingly stable. At this time, some poems praising God and the monarch were produced. This poem is one of them.