Transatlantic Diffusion is the, often maligned, theory that there was contact between the Mesoamerican cultures of South America and the ancient Chinese. This is dismissed as impossible due to the difficulty in crossing the Pacific Ocean. Thor Heyerdahl's Kon-Tiki voyage successfully proved that ancient cultures could have indeed crossed the Pacific.
“... dissidence and controversy are what bring science forward. Agreement and acceptance rarely stimulate experiments and progress.”
― Thor Heyerdahl, Kon-Tiki: Across the Pacific by Raft
For this invention, we invented an entire Mesoamerican culture, known as the Ha'hun. For them, we created a limited printed language based on gestural languages of Mesoamerican and ancient Chinese origin. Artefacts (both printing blocks and printed handmade papers) were created for authenticity, then the "findings" were written up in a book designed by us.