ask the way from a blind person—seek advice from one who can offer none; ask advice from an ignorant person
? 但只問著晚生，便是“～”了。(《儒林外史》104) Asking me about it is like asking the way from a blind man.
問道于盲wen dao yu mang
ask the way from a blind person—seek advice from one who can offer nothing
問道于盲wèn dào yú mánɡ
盲：瞎子。向瞎子問路。比喻向一無所知的人求教。seek advice from one who can offer none, ask a blind man the way