Introduction to the Volunteer Smile Wall: The success of an event cannot be achieved without the hard-working volunteers behind it. During the Olympic sailing competition, thousands of volunteers dressed in auspicious cloud costumes shuttled through the Olympic sailing venue, becoming a unique sight here. In the Olympic Sailing Museum, there is a volunteer smile wall. The warm and beautiful smiles have touched the world here. It can be said that their efforts, together with the blue sea, have witnessed the success of the Olympic event.