Yangjiatang in Songyang is an ancient village. The houses in the village are all earthen walls. The walls hit by yellow mud make the residents warm in winter and cool in summer, which is not beautiful. But with the return of urban people to the psychology of the true, the feeling of soil falling off here is sought after by people. The earth wall house is even a piece of the city, the color is the most simple and unpretentious earth color, hidden in the mountains, feel very comfortable.