Appreciation of Poetry: What are the characteristics of the language use of an absent poem?

The poet used the technique of asking and answering questions to describe the anxiety of not finding a place. His writing is complicated, his pen is simple, his feelings are profound, and his description is plain. White clouds are nobler than hermits, and pine trees are used to describe hermits' character. The more I admire you when I didn't meet you when I was writing. Some people think that this poem was written by Sun Ge, entitled "When Visiting Xia Zun".