Zhè / dào / míyǔ / de / mímiàn / hěn / jiǎndān / dàn / dá'àn / bìng / bù / róngyì / cāi

这道谜语的谜面很简单，但答案并不容易猜。

The wording of this riddle is simple, but the answer is not easy to guess.