The "E.CO Rotunda" project starts from the advocation of human-landscape and rural revitalization, and executes through collaborative architectural practice of the construction of a Bamboo Rotunda at Yim Tin Tsai. Through an integration of the traditional craftmanship translated by local bamboo master builder, and the contemporary design and co-construction concept toward collaborative place-making, the project aims at creating a social-ecological platform for inheriting the craftmanship together with the natural and culture. By introducing multi-faceted and multi-scale collaboration, E.CO Rotunda targets to motivate people joining forces on rediscovery and co-management of the Yim Tin Tsai landscape, to let villagers, visitors, builders, craftsmen, and the general public all enjoy in specific ways of their expertise and interests, and by place-making strategy, to develop a sustainable ecological-cultural platform by orchestrating bamboo construction, art, music and craftmanship throughout the events.