你是猴子派来的救兵吗
[nĭ shì hóu zi pài lái de jiù bīng ma]
Literally meaning 'Are you the reinforcements sent by a monkey? ', actually from an episode of the classic Chinese television drama based on the myth Journey to the West. When the Monkey King causes confusion, he once lied to another god saying these soldiers are the reinforcements arranged by Jade Emperor to support him, when they are not. So today, it often appears as a teasing way to express surprise or suspicion about someone or something unexpected.