old tea-horse road or southern Silk Road, dating back to 6th century, from Tibet and Sichuan through Yunnan and Southeast Asia, reaching to Bhutan, Sikkim, India and beyond
road / path / CL:條|条[tiao2],股[gu3] / principle / truth / morality / reason / skill / method / Dao (of Daoism) / to say / to speak / to talk / classifier for long thin things (rivers, cracks etc), barriers (walls, doors etc), questions (in an exam etc), commands, courses in a meal, steps in a process / (old) circuit (administrative division)