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Cai Lun was born in Guiyang now known as lei yang, Hunan around 50 AD

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He lived during the reign of Han Dynasty.

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He arrived at the imperial court around 75 where he served as a chamberlain for emperor Zhang.

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After assisting emperor He in a 92 coup against Dowager Empress Dou, Cai was promoted to the Head of the imperial supply department.

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Cai substanly improved the paper making with tree bark, hemp waste, old rags and fishnets which resulted in fame and wealth for Cai.

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121 AD