The idiom cup bow snake shadow evolved from fable story, which is a metaphor for mistaking illusion for reality and describing people as suspicious and asking for trouble. This story tells us a truth: no matter what problems we encounter in life, we should try our best to find out the truth and seek the correct solution through investigation and research. At the same time, it satirizes people who are suspicious in the face of illusory phenomena and ask for trouble. What does the cup bow snake shadow tell us? This story also tells us three meanings: first, do things with an open mind, don't make something out of nothing, and dare to do it is what a gentleman does. Second, be good at thinking and be brave in discovering. Third, don't be fooled by the illusion of things.