- 非法行为 fēifǎxíngwéi illegal actact or behavior that violates the law which may incur criminal liability and civil obligations for damages
- 非法同居 fēifǎtóngjū illegal cohabitationthe act of living together as a couple without being legally married
- 非法移民 fēifǎyímín illegal immigrantsomeone who moves to another country to settle there without legal permission
