Which ancient civilization held the first recorded 'product launch event' for paper, with royal officials demonstrating its use to merchants around 105 CE?

Before modern marketing campaigns and flashy product reveals, ancient civilizations had their own methods of introducing new products to the marketplace. These early 'product launches' often coincided with religious festivals or royal ceremonies to maximize visibility. The development and introduction of novel goods was a crucial aspect of ancient commerce and cultural exchange. Test your knowledge about one of history's most significant early product introductions that revolutionized an ancient economy.

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Han Dynasty China, where court official Cai Lun presented the new paper-making technique to Emperor He
Ancient Egypt, where Pharaoh Ptolemy IV unveiled papyrus scrolls as a replacement for stone tablets
Roman Empire, where Emperor Claudius introduced parchment as a new writing material from the East
Mesopotamia, where King Hammurabi presented a new clay tablet production method to royal scribes