Dancing on air: A "body flier" from the Latvia Pavilion turns some mid-air moves, much to the appreciation of pavilion visitors, some of whom get to join in. The makers are hoping this state-of-the-art wind-tunnel technology will catch on in 皇冠体育app. Photo by Pei Jin / Xinhua
Visitors spell out the word "Expo" using their arms and legs. Wang Jianwei / Xinhua
