Because when the poet Wang Anshi wrote this poem, he used many words, but he felt that they were not suitable. Later, when he saw the sentence "When will the east wind come, the green lake will go up the mountain?" Inspired by this, he used the word "green".

The word "green" in the poem is cleverly used and has been widely praised since ancient times. According to Hongmai of the Southern Song Dynasty (Volume 8 of the continuation of "Rong Zhai Essays") According to records, Wang Anshi used more than ten words such as "to", "guo", "ru" and "man" before finally choosing the word "green". So, what is so good about this word "green"? It turns out that the word "green" is an adjective that expresses color. When used in the poem, it becomes a verb with a positive usage. It has a sense of color and dynamics, giving people a beautiful visual image.

From Rhetorically speaking, this is a kind of transaesthetic technique, also called synaesthesia. Generally, wind can only be identified by hearing and feeling, but in spring it is a gentle and smooth wind that does not blow cold on the face and makes no sound in the ears. Now use "green" to To describe it, the hearing and feeling, which are not very easy to convey, are transformed into vision, which not only shows the arrival of the spring breeze, but also shows the changes in the water towns in the south of the Yangtze River after the spring breeze arrives. It is full of vitality and prosperity, giving people a strong feeling of beauty.