Traditional Culture Encyclopedia - Traditional festivals - Were there red and blue pencils in 1940
Were there red and blue pencils in 1940
Red and blue pencils have been around since the late 1800s and early 1900s
They were already common in China in the 1940s.
?
For example, during the Yan'an period, Mao Zedong used red and blue pencils to approve documents and telegrams
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