The city of Chang'an in the prosperous Tang Dynasty was still prosperous, but everything in it was like dust, washed away by the passage of time, and Chang'an remained unchanged.
It mainly tells fictional historical stories based on historical figures such as Lu You, Li Bai, and Du Fu.
Since ancient times, it has been difficult for mountains and rivers to survive forever. Where in the world can Chang'an prosper?
Intention: cause and effect