The concept of the criminal gang with the underworld characteristic is wrong.

The crime has presented evolution quickly from gang crime to crime of underground society organization, vastness within the criminal zone and clear type of criminal organization.

The article starts with one case of the post-1990s gang crime,tries to analyzes and discuss the psychological mechanism of them,and expects that it is beneficial to prevent and reduce teenage regiment crime.

Sociological analysis on the cause of juvenile delinquency;

The sorts and characteristics of juvenile delinquency are summarized and the important role that family education plays in juvenile education is expounded.

As a social phenomenon,delinquency is widespread in many countries and the world today is very concerned about the complex social problem.

Probing into countryside kids law education absence and their committing crime;

Study on the Phenomenon of Crime by College Students;

On the Causes and the Precautions of College Students Violating Laws and Committing Crimes;

College students on how to prevent crimes

Then,a new balanced system is not immediately established after the original one having been broken,so some society members transgress the bounds of decency,among which the most outstanding phenomena is crimes of sorts.