Only later, rhetoric became more and more advanced, paying attention to writing green without the word "green", and red and green fell into the common image. In contrast, fewer people write green directly with "green", and all the meetings are held through other images.
But in ancient poetry, in the era without these exquisite, it is very much.
For example, the well-known "white hair floating green water, red palm stirring clear waves", Bai Juyi's "sunrise is redder than fire, and spring is as green as blue as river", He's "Jasper adorns trees with green silk tapestries", Du Mu's "Thousands of miles of warblers sing green and reflect red, and the water town is full of wine flags", and Zhang's "Green Daili, Green Daili".