The most important Invention of the Tang and Song Dynasty would be Printing. Before printing in China everything was copied by hand and it was very expensive. China began printing in the 600 A.D. To print they used blocks of woods and they cut characters of an entire page. So they would carve in the wood characters. After they did that they put ink was placed all over the block. Then a paper was put on top of that the block with the ink. It’s was expensive because of all the steps that they had to do and also the time. But even though it took a long time to carve in the wood you can be reused over and over again. They then started to print books. 868