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Although there is no exact date known, between 618 and 907 AD–The period of the Tang Dynasty–the first printing of books started in China. The oldest extant printed book is a work of the Diamond Sutra and dates back to 868 AD, during the Tang Dynasty. The Diamond Sutra was printed by method of woodblock printing, a strenuous method in which the text to be printed would be carved into a woodblock's surface, essentially to be used to stamp the words onto the writing surface medium. Woodblock printing was a common process for the reproduction of already handwritten texts during the earliest stages of book printing. This process was incredibly time-consuming.
Diamond Sutra