打闷葫芦
      Explanation: Puzzle: Solutions for the metaphor is difficult to guess or wonder what if. Wonder if that is what guess what.
      Source: Qing Cao Xueqin's "Dream of Red Mansions" The Fifth (Xian Gu "fear of leaking sky, they cover the volume, laughing to the Jade Road, 'and I went to play with wonders, why this play puzzle'."
      Examples: (Xian Gu "fear of leaking sky, they cover the volume, laughing to the gem:" The spectacle, and as I went to play, why in this ~. "(Qing Cao Xueqin's" Dream of Red Mansions "The Fifth)