A reform-through-labour institution in Lingyuan, Liaoning Province made a study 124 former inmates who had acquired technical proficiency certificates in prison. All of them had jobs and none had committed new crimes.

• 辽宁省凌源某劳改场所对124名在监内取得技术等级证书的刑满释放人员进行调查，出狱后不仅全部有了工作，而且无一人重新犯罪。