This passage begins with the description of the environment, and the function of quoting the famous sentence "White dew is frost" in the Book of Songs is to create an atmosphere for the following narrative. Jia Jian is from The Book of Songs, National Style and Qin Feng.

The sword is pale, and the white dew is frost.

Large areas of reeds are green, and the dew in the morning turns into frost.

The Book of Songs is mainly composed of four words and miscellaneous words. Structurally, the form of repeated chapters and sentences is often adopted to enhance the lyrical effect. Only a few words are changed in each chapter, but it can receive tortuous and changeable artistic effects. In language, we often use disyllabic rhymes, reduplications and conjunctions to describe things and imitate sounds, which is poor. "Less is always more, and the situation is very clear." The Book of Songs is the first collection of poems in the literary history of Han Dynasty. It contains about 500 years of poetry from the early Western Zhou Dynasty to the mid-Spring and Autumn Period. It was compiled in the Spring and Autumn Period. It is said that it was compiled by Confucius, the founder of Confucianism. Originally called The Book of Songs, it was later regarded as one of the classics by Confucianism, so it was called The Book of Songs. It is the source of China's poetry, the starting point of China's poetry history, and occupies a prominent position in the history of China literature development. The Book of Songs is divided into three parts: style (160), elegance (105) and fu (40). Are all named after music. "Wind" means tone. The so-called Shaanxi, Feng Wei and Zheng operas of the ancients are just like Shaanxi, Shaanxi and Henan operas. "Elegant" means positive, which can be divided into elegant and indecent. People in the Zhou Dynasty called Zheng Yayue, just as people in the Qing Dynasty called Kunqu Opera Ya Bu, with the meaning of honorific title. "Ode" is a kind of music song used for ancestral temple sacrifice. The Book of Songs has a profound influence on the development of China's literary history in the past two thousand years, and it is a very precious ancient historical material.