(1) The poem selects images such as the lonely city, white clouds, Chushui, official residences, autumn grass, female walls, crows, flat sand, sunset, flying birds, Yiyang Creek, etc. , creating an artistic conception of desolation, loneliness, confusion, and desolation.
(2) Poetry uses the techniques of expressing emotions through scenery, using the past to satirize the present, imagination and personification. The poet uses this dangerous and desolate ancient city, empty city, and desolate city to point people's attention to historical relics that can serve as a warning, prompting people to think deeply and express their concern for the country and the people for the national destiny of the Tang Dynasty.
Omitted