300 kilometers west of Beijing, Xinghe County of Ulanqab is the closest natural pasture to Beijing. The Laoli Lake is a precious water source in this pasture. Every year during the migration season, a lot of swans come here to rest. But the grassland here is very fragile, and the large area of bare ground is full of broken rocks. Different from other eco-forests of the Greening Foundation, which mainly focus on windbreak and sand fixation, we have selected seven species of trees that not only adapt to the local climate but also form an ornamental landscape with colored leaves in autumn, simulating natural mixed forests and providing biodiversity for the Laoli Lake. It also fosters an ecological education base for homestays and camps surrounding the lake. We weave the pruned branches of trees into an art installation. The stones cleared from the site are piled up into memorial walls, benches, paved into forest paths and tree pits... The discarded materials can also become part of the site in another way. We also designed an exclusive logo for the ecological forest, made explanatory signs for each tree species, and left small clues for forest exploration.