/kloc-before the 6th century, when papermaking in China was not popularized in Europe and America, what writing materials did they use?

Japan is probably bamboo slips and wooden boards.

In the Arab region of Central Asia, as long as it is a clay tablet, such as Central Asian cuneiform characters, it is recorded on the clay tablet.

In Europe, valuable documents, such as church bibles, are recorded on sheepskin, which is peeled off and dried. Later, they were recorded on papyrus, which is made of a plant called papyrus, which grows on the beaches of the Nile Delta at the mouth of the Nile River in Egypt and Sicily, Italy.

This is their original invention, papyrus, which was used in ancient China. (For the emergence of modern paper, Egyptians should hate it the most. Hehe, the people have said that they have cut off their money. )