Huolongjing

Huolongjing is a book from ancient China that talks about different types of weapons and how they work. It was written a very long time ago by a guy named Jiao Yu. In the book, he tells us how to make things like rockets, bombs, and guns!

Think about playing with Legos. When you build with Legos, you can make different shapes and structures. Just like Legos, Jiao Yu tells us how to put different things together, like gunpowder, paper tubes, and bamboo, to create cool weapons.

Now, you might be wondering, what's gunpowder? Gunpowder is a special kind of powder that can cause explosions! Jiao Yu discovered that gunpowder could be put into a paper tube, lit on fire, and shot out of a bamboo tube to make a fire arrow. It's kind of like a firework, but it can hurt people and things.

The book also tells us about other very strange sorts of weapons like fire-lances, flamethrowers, and poisonous gas. These weapons all use things like fire, heat, and poison to harm the enemies.

So to sum it up in a sentence, the Huolongjing book from ancient China teaches us how to make cool and interesting weapons using things like gunpowder, bamboo, and paper to harm our enemies in war.