A tank of the "red army" drives on a makeshift bridge to break the defence of the "blue army" a military exercise in a training base in the Inner Mongolia Autonomous Region in north China September 27, 2005.  (Xinhua)

A helicopter protects the "blue army" tanks in moving towards the enemy positions in a military exercise in a training base in the Inner Mongolia Autonomous Region in north China September 27, 2005. (Xinhua)

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