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Asked by Emily | Nov. 20, 2012 16:24
About:Four Great Inventions of Ancient China

When did bi sheng invent the printing technique?

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Answered by Peter | Nov. 21, 2012 00:09
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During the reign of Emperor Ren Zong of the Northern Song Dynasty(960 - 1127 AD), Bi Sheng invented moveable, reusable clay type after numerous tests.
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