What are the useful uses of the combination of reality and fiction in poems learned in senior high schools?

There are mainly "Qinyuanchun"? Snow ","Niannujiao? Jinggangshan ","Fu? Yongmei and Du Fu's The Yellow River is Recovered by the Imperial Army, Li Qingzhao's Wuling Spring, Wang Changling's The Farewell of Furong Inn and Xin Qiji, Bao Zhao's Growing Old Together, etc.

The emptiness and reality of poetic theory usually include four connotations:

1, reality refers to the entity image described by the poet; Virtual refers to the blank image implied by the entity image.

2. Reality refers to an objective and tangible object; Virtual refers to subjective intangible activities.

3. Reality refers to a specific description; Virtual refers to abstract discussion.

4, stereoscopic, refers to the fundus scene;

5, virtual, refers to the scenery.

In short, the idea of seeing is believing is empty; It's already true, and it's empty before it happens; Being there, looking up and looking down is true. After a thousand years of thinking, Wan Li sees nothing.