The symbolism of the cup and bow and the shadow of the snake is: firstly, to do things with an open mind, do not be suspicious without a basis, dare to do and take responsibility for it is a great man. Secondly, you should be good at thinking and discovering. Third, do not be confused by the illusion of things.

There was a man named Le Guang in the Jin Dynasty who invited his friends to drink in the hall of his house one day. One friend was drinking when he suddenly saw what appeared to be a small, swimming snake in his glass, but got in the way and drank the wine anyway. After drinking, he was so upset that he returned home and fell ill. After a few days, Le Guang heard the news of his friend's illness and learned the reason for his illness. So he went to the place where he had been drinking that day to check it out. It turned out that the shadow of the bow and arrow on the wall of the hall happened to be reflected in his friend's wine cup, which was very much like a small snake. Le Guang then ran to his friend and explained this to him, and when the man understood the reason, he was cured immediately.