As they walked, Li Wei marveled at the sights that made his home so advanced compared to distant lands.
Ancient China for Kids: Inventions and Technology - Ducksters
: Outside a local temple, he saw a monk using a woodblock printing press to create dozens of prayer scrolls in minutes—a task that once took months by hand.
: At the market, Li Wei watched a merchant exchange a lightweight slip of paper for a crate of silk. This "flying money" was much easier to carry than heavy bags of copper coins. 2. The Social Ladder