1. Location factor: Yunlu in the west hill of Greentown may be located on a relatively low terrain, while Yuanshan may be located in a higher mountain area in spring and autumn, so the height difference may lead to the height difference between them.
2. Topography: Yunlu Mountain in the western hills of Greentown may be located in valleys or low-lying areas, while Yuanshan Mountain may be located in ridges or hilltops in spring and autumn, so the heights of the two may be different due to different topography.
3. Architectural design and use: The cloud house in the west hill of Greentown may be built to meet specific architectural design or use, so the height of the building may be consciously limited in the design. The distant mountains may not have these restrictions in spring and autumn, so they may be higher.