The "emptiness" in poetry refers to a kind of virtual image and ethereal realm that is invisible and intangible, but can be felt between the lines, including the following three kinds:
1. A world of dreams of immortals and ghosts, such as a fairyland in paradise.
2. Scenes that have passed away. For example, in Li Yu's Yu Meiren, "The carved fence should still be there, but Zhu Yan has changed it", and Su Shi's Nian Nujiao? In "Red Cliff Nostalgia", "When talking and laughing, the whole army will be wiped out".
3. Lenovo's scene. Born of association, such as Liu Yong's "Yulinling", "Where do you wake up tonight, Yang Liuan, the wind is fading away?"
The "truth" in poetry generally refers to the real images, facts and reality in the objective world that the author can see. Such as "Niannujiao? In "Red Cliff Nostalgia", "The rocks are over the air, the waves beat on the shore, and thousands of piles of snow are rolled up", and in "Yulin Ridge", "It is too late for the pavilion" and so on.