There is a difference between poetry appreciation and contrast and the combination of reality and fiction.
This is not a combination of reality and reality. Although the spring scenery in front of us is empty, it is real. Comparing the scenery of two different periods is real, not virtual. The combination of reality and fiction is to combine abstract narration with concrete description, or to combine description of real life with memory and imagination. The relative comparison between two things or one thing is called contrast. The combination of reality and fiction is to better express a meaning, not to compare. Comparison is to compare two things and draw some conclusions.