A staff worker wipes the window at the new hall of China Science and Technology Museum in Beijing, China, September 13, 2009. The new hall of China Science and Technology Museum which located in the Olympic Park will open to the public on September 20. [Xinhua]

People visit the new hall of China Science and Technology Museum in Beijing, China, September 13, 2009. The new hall of China Science and Technology Museum which located in the Olympic Park will open to the public on September 20. [Xinhua]