legal ground
Article 78 of the Criminal Law 1
Criminals sentenced to public surveillance, criminal detention, fixed-term imprisonment or life imprisonment may have their sentences reduced if they consciously abide by prison regulations, receive education and reform, and truly show repentance or render meritorious service during the execution period; One of the following major meritorious deeds shall be commuted:
(a) to prevent others from engaging in major criminal activities;
(2) reporting major criminal activities inside and outside the prison, which is verified by investigation;
(three) there are inventions or major technological innovations;
(4) sacrificing oneself to save others in daily production and life;
(five) outstanding performance in resisting natural disasters or eliminating major accidents;
(6) Having made other significant contributions to the country and society.