the Qin (221-206 BCE) and Han (206 BCE to 220 CE) dynasties, they started massive and advanced road building. For the most part, they took advantage of natural corridors discovered and used by ancient peoples earlier. In order to build these important paths along the steep and dangerous cliff, the ancients used the innovative road building technique “Gallery Road” to fix the roads on the rock walls and cross the mountains, rivers and valleys. See also Stone Cattle Road Covered bridge Archaeology in China Shudao References Ancient roads and tracks Transport in China Plank road