Expo ``Big Roof Ring'' construction site unveiled, one year before opening. Executives from the Exposition Association, which is the main body implementing the project, emphasized that around 80% of the project has been completed.
Once completed, it will be one of the world's largest wooden structures, and will be a key part of the venue's concept. It was built as a symbol to express "diverse yet one," and will have a circumference of approximately 2 kilometers and a maximum height of 20 meters.