Gallery preparation on the ground area

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we would like to know about the stall(gallery) preparation to do the exhibition on the ground(Field) for more than 70000 people in one day. The flow of people will be more for four hours. we need its shape And size of the shed and well decorated front view. The lighting system and its well decoration is also the most important facter. The size of the photo is 3'*4' and 160 boards will be displyed in this program.