character: Ancient Chinese Engineers
topic: Design and Planning of the Great Wall
grade: 3
subject: History
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character: Emperor Qin Shi Huang
topic: Role in the Construction of the Great Wall
grade: 3
subject: History
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character: Han Dynasty Builders
topic: Improvements Made to the Great Wall
grade: 3
subject: History
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character: Chinese Artisans
topic: Techniques Used in Great Wall Construction
grade: 3
subject: History
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