character: Suzang
topic: The Invention of Paper
grade: 4
subject: Social Studies
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character: Noboru
topic: Silk Production Techniques
grade: 4
subject: Social Studies
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character: Liang
topic: Gunpowder and its Trade
grade: 4
subject: Social Studies
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character: Mei Ling
topic: Compasses and Navigation Innovations
grade: 4
subject: Social Studies
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