The first known transportation was walking, humans began walking upright two million years ago with the emergence of Homo Erectus (meaning upright man). The previous text is in English. Here is a translation to Chinese (Simplified):
已知的第一种交通方式是步行。200 万年前，随着直立人（Homo Erectus，意思是直立的人）的出现，人类开始直立行走。