This story comes from ancient China, around 1000 BCE, about two royal brothers named Boyi and Shuqi. When their father, the king of Guzhu, died, each brother insisted the other should inherit the throne. Neither would accept power, believing their sibling was more worthy.
Eventually, both fled the kingdom rather than rule. Later, when the Zhou Dynasty overthrew the brutal Shang Dynasty, these brothers refused to serve the new rulers or even eat grain grown under Zhou rule, considering it morally tainted. They retreated to Mount Shouyang, surviving on wild ferns until they starved to death.
Chinese culture remembers them as paragons of moral integrity who chose principle over practical survival. Their story became a symbol of uncompromising ethics, though also a cautionary tale about idealism taken to extremes.