A visitor views a pavilion model composed by 668 abacuses at an exhibition with the theme of abacus culture in Taiyuan, capital of north China's Shanxi Province, April 27, 2011. More than 100 abacuses were displayed at the exhibition, which kicked off Wednesday. (Xinhua/Zhan Yan)
A visitor views a 6 meters' long abacus composed by 1,598 beads at an exhibition with the theme of abacus culture in Taiyuan, capital of north China's Shanxi Province, April 27, 2011. More than 100 abacuses were displayed at the exhibition, which kicked off Wednesday. (Xinhua/Zhan Yan)
A visitor takes photos for the abacuses on the wall at an exhibition with the theme of abacus culture in Taiyuan, capital of north China's Shanxi Province, April 27, 2011. More than 100 abacuses were displayed at the exhibition, which kicked off Wednesday. (Xinhua/Zhan Yan)
