A visitor takes picture of rocket models at the China Space Technology Exhibition in Jinan, East China's Shandong province, April 27, 2012. Covering an exhibition area of 4,000 square meters, the expo displays various products of China's space industry including the models of carrier rockets and the Shenzhou spacecraft. [Photo/Xinhua]

A visitor experiences an astronaut's training facility at the China Space Technology Exhibition in Jinan, East China's Shandong province, April 27, 2012. [Photo/Xinhua]