This documentary tells the history of green brick tea and the story of ancient tea horse road. The tea horse road is like the great road to civilization composing a magnificent epic. This film follows the footprints of history and retraces the road of economic and cultural exchange taking green brick tea as a thread. We will reconstruct the grand occasion of tea horse trade in Ming and Qing Dynasties by visiting Yangloudong Village. More importantly, this film shows the tea farmers’ spirits of innovating and sticking to their faith.