Group-scrambling case is a kind of social public security case, which emerges unexpectedly.

The group events caused by land expropriation,a kind of deviance resulting from the damaged benefit in the process of land expropriation where farmers concerned cannot protect their own interests in a normal way,severely affect harmony and stability of the rural areas,even that of the whole society.

The necessary way to solve the problem of group events is to seek dialogues between the two or more disputants.

Research on mass incidents-the status and role of the public security organs;

on the devdopment discipline of mass incidents and Countermeasures;

The impact of public security propaganda on the disposal of mass incidents

A Discussion on Persuading Art of Handling Mass Events;

A Discussion on the Functional Role of Public Security Organs for Handling Mass Events;

The nature of the mass events is the contradictions among the people.

On the Prevention and Countermeasures of Group Events;

Property Rights Analysis and Contractual Governance on the Group Events of Flight Delay;

Domestic Group Events and Its Development Trends;

The group incidents of university students have a significant effect on the security and stability of the campus which produces an obviously negative influence on building the harmonious campus.

In the social transforming period,uncommon public crisis frequently occurs,and recently "group incidents" serve as one of the prominent manifestations for the intensification of contradictions.

It is an important topic for police organs to prevent and handle group incidents effectively.