(1) The word "move" in "window grilles bring scenery, legends and operas to the window" uses personification rhetoric to bring lifeless window grilles to life. (2) In the sentence, "window grilles" are compared to "poetry" and "firewood", which vividly describes the meaning and value of window grilles in people's minds. (3) It not only summarizes the contents of window grilles described in the previous paragraph, but also leads to the following description of the changes and inheritance of window grilles, which plays a transitional role.