What are 2 inventions of the tang and song dynasties that helped china achieve the golden age?

Over the centuries, humanity used whatever they could get their hands upon in order to document their thoughts. Stone tablets were common, but any writing surface would do. Turtle shells, bones, cave walls, and carvings in various mediums all help people to put down their thoughts as they happened. For 500 years, China had papermaking skills, but it was difficult to write down words by hand quickly to have many books. With woodblock printing, being able to print whole pages at once made it easy to create multiple copies of books, pages, or articles like this one.

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