* The Diamond Sutra, printed in 868 AD, is the oldest known complete printed book, and it was printed in China using woodblock printing.
However, other countries also developed early printing methods:
* Korea developed movable type printing using metal around the 13th century.
* Europe adopted printing techniques from the East and developed Gutenberg's printing press in the 15th century, which revolutionized book production.
Therefore, while China holds the record for the oldest known complete printed book, it's important to acknowledge the contributions of other countries in the development of printing technologies.