Time flies, dynasties change, history repeats itself over and over again, and some people are famous throughout the ages, while some people are infamy. At that time, Chang'an was completely destroyed by a fire after being extremely prosperous. Now there are only ruins and overgrown weeds. Later, a poet visited this place, saw the ruined scene here, and was moved by the scene, so he wrote a poem "Chaos in Chang'an" with emotion: Thousands of palaces are scattered, the city and palaces are in chaos every year, prosperity disappears in an instant, and rain falls all over Chang'an.