The characters literally combine to mean: “Place (置) it (之) in a death situation (死地), and then (而后) it will find life (生).”
The origin of this idiom is a cornerstone of Chinese strategic thought, found in Sun Tzu's The Art of War and famously demonstrated by the general Han Xin in the 2nd century BCE. During a crucial battle, Han Xin positioned his much smaller army with their backs against a river, a move that defied all conventional military wisdom as it cut off their own retreat. He told his terrified soldiers, “We have nowhere to run, so we must fight to the death to survive.” This desperation fueled their fighting spirit, and they achieved a stunning victory against a superior force. This story cemented 置之死地而后生 in the Chinese cultural psyche. It embodies a deep-seated belief in the power of human will under extreme pressure and the paradoxical idea that life can emerge from a situation of certain death. Comparison to Western Concepts: This is far more intense than just having your “back against the wall.” A closer Western concept is “burning your bridges” or “burning the boats,” where a leader intentionally destroys the means of retreat to force their troops to commit fully to battle. However, 置之死地而后生 is less about the physical act and more about the psychological transformation that happens in that moment of no return. It's not just a desperate gamble; it's a calculated strategy to unlock peak performance through manufactured desperation.
This is a formal and powerful idiom, often used to describe high-stakes situations. You wouldn't use it for trivial matters.