When someone leaves, one can see his hat, which is like a lid (亠 tóu lid), and his hair, which looks like a walking-stick (丿 piě walking stick) and a dot (丶 diǎn dot) from behind, and his skull, which looks like a pit (凵 qiǎn pit), and while he leaves he leaves traces (禸 róu traces of animal footsteps) behind.