When I first saw the theme Re-Turn, I thought of my hometown Heze, Shandong in East of China. I wanted to create some useful project for the community that lives nearby. Suddenly I found the cloud is a good Idea, because when I was a child I liked to observe clouds when I’m alone outside. My hometown is near by the Yellow River, so I chose the site near my community as the location. Then I found two good references. The first one is Francis Kéré's work, Gando Primary School, in his hometown in Burkina Faso, one of the poorest countries in Africa. He came back to his country after studying aboard for many years, and built the first school in his hometown. Secondly, I found that “Rammed Earth” can be used as local material, using basically clay, sand and gravel from the surroundings of the construction site in certain locations, which is a very ecological and interesting old material that can be used in new ways. After some studies I chose an empty square by the river which is not very far from several schools in my area, and then I proposed a 2 floors high library which are separated from the ground by pillars and where the roof top can be used to watch the river while reading or having a drink. I used Rhinoceros for making my 3D model and then I did the render in Lumion.