The soul of the criminal policy of temper justice with mercy began from ancient penalty ideas.Today the criminal policy was endowed with timetransgressive implication.
As the system of criminal trial in China is being changed from inquisitional into adversary;to construct discovery system has become an urgent problem to be solved.
Now the various countries mainly adopt two kinds of prosecutions patterns: One is the appeal monopolism,that is only the government can sued the criminal offender and the victim has no right to sue.