It shows that people who have been bitten by tigers really know the power of tigers.
This metaphor makes you nervous at the mention of terrible things. Even your face will change.
The source of "Two Cheng Quan Shu, Suicide Letter II": "True knowledge often tells the difference. I once saw a Fu Tian who was hurt by a tiger. Some people say that tigers hurt people, and everyone is not surprised. Only Fu Tian is different. "
For example, there is a poor country where there is light and security can be silent. (Ming Gui Youguang's Book on Water Conservancy in Three Districts)
reference data
Hao Cheng. Cheng Cheng's suicide note. Shanghai: Shanghai Ancient Books Publishing House, 2000- 12-0 1.