Tourists visit the Greenhouse of the International Horticultural Exposition 2011 in Xi'an, northwest China's Shaanxi Province, July 7, 2011. The Greenhouse located at the Splendid Lake is the botanic greenhouse of the International Horticultural Exposition 2011 Xi'an. Displayed in the house would mainly be rare plants and eco-landscape from different regions of various climates in the world.[Photo/Xinhua]