What kind of theme does the movie "Falling Leaves, Returning to Their Roots" want to express?

I think it's about a kind of "cultural nostalgia", and Zhao Benshan presents the image of a righteous friend. In the movie, he is as simple as a piece of mud, carrying the body of his deceased friend on his back, on the endless road, walking in the direction of his soul's hometown....... However, under the sky, where is the hometown? The longer the road under the feet, the more distant the distance to the end. At last, the countryside pass finally in sight, but it is immitigated into a piece of broken walls in front of the eyes, only the blue sky and white clouds remain unchanged, and the vast river flows forever.

This is a kind of nostalgia that makes people feel depressed and frustrated, and it is a kind of bereavement that makes you feel the decay of a good garden in the trackless time. Obviously, the "root" in the title and the so-called "home" here should not be interpreted as the origin of any specific character in the film, but are abstract cultural symbols of the traditional countryside, which is fading in the current of modernization.

Zhao Benshan left the city and returned to the countryside, carrying the body of his deceased friend on his back. However, the countryside, which symbolizes the "home of the heart" or the "root of culture", recedes from behind him gradually, and in the plot, just like the stage's movable scenery, they change behind Zhao Benshan scene by scene and pass by him again and again. It seems to tell people that "home" is always at his feet, but it's a shore that can never be reached.

Back to the name of the movie, "Falling Leaves, Returning to the Roots," I think the so-called "roots" here are the traditional Chinese countryside, and the "roots" that they aspire to are fading away step by step, just like the last time Uncle Zao Benshan finally found his worker's hometown, which had become I think this is a sign that they will never be able to return to their "roots". Because this so-called "root" is disappearing 。。。。