Why is the subject and object of Chibi Fu separate?

The guests in The Former Red Cliff Fu are fictional by the author. The answer between subject and object is a traditional technique in fu, and both subject and object are the embodiment of the author. In Qian Chi Bi Fu, the guest's views and feelings are Su Shi's daily feelings and worries, while the master perilla expresses his transcendental understanding of man and the universe, which is caused by the doubt between vuvuzela and subject and object.