C89 Test firework

Returning to her room, Yun Ruo quickly prepared the charcoal, salt, and sulfur she bought. She then added the various metal powders to make colorful fireworks.

This empty-handed history of the dynasty has no fireworks, so to send this to the emperor, it must be the most unique of the most beautiful gifts.

Yun Ruo Lu placed the firework she prepared into the bamboo tube