Theme: Effort, Determination
Summary: During the Goryeo Dynasty, a clever boy once saw fireworks bursting brightly in the sky.
He thought, “I want to make gunpowder and invent weapons too!”
At that time, gunpowder was only made in China, and making it was not easy.
Even so, when he grew up, he finally succeeded in creating gunpowder and inventing powerful weapons.
Shall we find out how he did it?

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