Cheng Chieh

Cheng Chieh is a convicted criminal known for committing a mass stabbing on the Taipei Metro on May 21, 2014, which resulted in the deaths of four individuals and injuries to 22 others. The attack shocked Taiwan and raised significant concerns regarding public safety and mental health. Cheng was later sentenced to death, and his case has become a reference point in discussions about violent crime in public spaces in Taiwan. His actions are often cited in relation to subsequent incidents of violence on public transportation, including a similar attack carried out by another individual in 2022.