Q: Why did the books of the Tang Dynasty in the play still use bamboo slips?

Bamboo slips were written materials from the Warring States to the Wei and Jin Dynasties.

In the Tang Dynasty, paper had completely replaced bamboo slips, but movable type printing had not been invented. Books published in large quantities could be copied by block printing, and a small number of books could only be copied word by word by manpower, which was very expensive and small.

Therefore, in the Tang Dynasty, books written with bamboo slips still had preservation and use value.