Beaver to mouse
The Chinese idiom, Pinyin, means that things can't be successful. It's the same as "baiting mice with beavers". From reform and self improvement.
The origin of Idioms
The speaker, sitting in the well, peeping at the sky, ~ ear! Wang Tao's reform and self improvement in Qing Dynasty
Idiom usage
It is a metaphor for failure
Beaver to mouse
ideal setting for a couple in love - huā qián yuè xià