Among the high mountains and ridges of the Hengduan Mountains, beside the turbulent waves of the Lancang River and the Jinsha River, the Ancient Tea Horse Road is like a silent dragon, winding for thousands of years. The "thousand-year letters" that travel along this ancient road do not refer to a specific letter, but to the various written carriers left by caravans, merchants, travelers, and border guards on this trade and cultural channel for thousands of years. They are the beating pulse of civilization on the Tea-Horse Ancient Road, and they are precious memory heritage that spans time and space.
