Legal analysis: the reduction of sentence should be determined according to the degree of meritorious service and the criminal circumstances of the suspect. The lenient punishment after meritorious service is less than surrender, but every criminal suspect can surrender. Those who have made significant meritorious service and surrendered themselves shall be mitigated or exempted from punishment. After a criminal suspect is interrogated or compulsory measures are taken, he shall entrust a professional criminal defense lawyer. After understanding the case, the Lawyers Association will collect the evidence of the criminal suspect's surrender and meritorious service in time, and strive for the opportunity to reduce or exempt the criminal suspect from punishment at the trial stage.
Legal basis: In the first paragraph of Article 68 of the Criminal Law of People's Republic of China (PRC), criminals who have made meritorious deeds such as exposing other people's criminal acts, verifying them, or providing important clues to solve other cases may be given a lighter or mitigated punishment, and those who have made significant meritorious deeds may be given a lighter or exempted punishment.