The reindeer is a rare animal that lives in cold regions and has important ecological, economic and cultural values. They are keystone species in Arctic and subarctic ecosystems, providing food for carnivores, while their feces nourish the soil and maintain ecological balance. The reindeer's thick double fur and wide hooves allow them to adapt to harsh climates and complex terrain, they feed on mosses, lichens and herbaceous plants, and their foraging behavior has a positive effect on vegetation growth. In order to protect the reindeer, nature reserves have been established, illegal hunting is restricted, and their sustainable development is promoted through cultural heritage and ecotourism. However, the survival of reindeer still faces threats from habitat destruction, climate change and human activities.