《后汉书·列传·南蛮西南夷列传》
那裹的人都披着头发，衣襟向左开，说话多喜欢用比喻，生活环境大致同汶山夷相同。
其人皆被发左衽，言语多好譬类，居处略与汶山夷同。
The people there all wore their hair and their lapels opened to the left. They liked to use metaphors when speaking. Their living environment was roughly the same as that of the Wenshan barbarians.