Talking to him often leaves you totally befuddled.
Tips
history
From 《后汉书·张楷传》: Zhang Kai was said to be able to conjure a five-li-wide fog around himself at will. The phrase 'fall into a five-li fog' took on the sense of 'be hopelessly lost in confusion' and has stayed that way.
usage
Idiomatic collocation: 坠入五里雾 or 如坠五里雾中 ('as though fallen into a five-li fog'). 里 here is the old Chinese mile (~500m).
