A day's absence, such as separation from Sanqiu, is a metaphor for the feeling of living like a day (often used to describe the ardent yearning between lovers, but also to describe the yearning between mentors and friends).
Green is your collar, and leisure is my mood. Even though I didn't go to see you, didn't you receive my letter?
Green is what you wear, and leisure is what I feel. Even if I didn't pick you up, couldn't you come voluntarily?
Come and go, look around, on this tower. I haven't seen you for a day, like three months!
Extended data:
The original sentence in the Book of Songs Zheng Feng Zigan, the four sentences in the first chapter are: "Qing Zi's work is long in my heart. Even if I don't go, I'd rather not send a message? " Your green collar is deeply wrapped around my heart. Although I can't come to you, why don't you take the initiative to leave me a message? Later, Cao Cao borrowed this sentence in a short song, and the poet used this ancient poem to express his desire for talents.
The tone of the poem is euphemistic and emotional, which expresses the poet's inner activities, which is also the effect that his initial political documents such as "Order for the Wise" can't achieve.
Baidu Encyclopedia-Qingqing Zijiao
Baidu Encyclopedia-Not seen for a day, such as Sanqiu.