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After 1949, to have a picture taken in front of Tiananmen Gate was the ne plus ultra for every revolutionary tourist in Beijing.
There are a number of kiosks set up around the Square for tourists to grab a photo opportunity and commemorate their visit by having themselves snapped with Tiananmen Gate in the background. For many tourists - here as at famous sites throughout the world - it is a case of not cogito but rather kodak ergo sum.