Large-scale incidents of civil disobedience in the People's Republic of China are described by the Chinese government as "mass incidents" (simplified Chinese: 群体性事件; traditional Chinese: 群體性事件) or "mass frustration".
Mass incidents are defined broadly as "planned or impromptu gathering that forms because of internal contradictions", and can include public speeches or demonstrations, physical clashes, public airings of grievances, and other group behaviors that are seen as disrupting social stability. Mass incidents have occurred in China due to popular dissatisfaction with enforcement of China's one-child policy, crime and official corruption, and bus fares. Environmental issues and seizures of land by local governments were issues which resulted in mass incidents in 2011. That such incidents are reportedly increasing in China is a source of concern for its leaders.