I actively engaged in the process of cleaning the Han River alongside various groups and organizations. Initially, I volunteered alone at the Hangang Wild Bird Ecology Park, where I dedicated time to preserving the natural habitat. Afterward, I participated in several group clean-ups during the winter, spring, and summer breaks, contributing to the shared effort of environmental stewardship. Throughout these events, I collected and recycled trash at a local station, helping to promote a cleaner and healthier ecosystem for both wildlife and community members.