According to statistics, only 0.387% of the total number of criminals in custody in the country were given increased sentences because of new crimes committed in prison in 1990 and only 0.319% in 1991.

• 据统计，1990年全国在押罪犯中因在狱内重新犯罪而被加刑的只占在押犯总数的0.；387%25，1991年为0