First of all, the public security organs will take him into criminal detention according to the situation, and submit him to the procuratorate for arrest in three days, which can be extended by one to four days. The procuratorate will generally decide whether to approve the arrest within seven days. If he is a major suspect who has committed a crime on the run, has committed a gang crime or has committed multiple crimes, the time for submitting an arrest can be extended to one month, which means that criminal detention is generally more than ten days, and the longest is 37 days. The investigation period after arrest shall generally not exceed two months, and the search for cases with complicated cases may be extended by one month with the approval of the people's procuratorate at the next higher level. If it is an area with inconvenient transportation, a major criminal group case, a fugitive crime, etc., it can be extended for another two months with the approval of the provincial procuratorate. For suspects who may be sentenced to a penalty of less than ten years, they shall be extended for another two months with the approval of the provincial procuratorate. In other words, the time spent in the public security stage is generally about two and a half months to three months, and the longest is eight months. Then, the case is written by the case-handling personnel of the public security organ and the case file and evidence are transferred to the procuratorate, that is, the stage of examination and prosecution. This stage is usually one month, and it can be extended by half a month for major and complicated projects. If the procuratorate recognizes the need for supplementary investigation after examination, it may return it to the public security organ for supplementary investigation or conduct investigation on its own. Supplementary investigation shall be completed within one month, and the supplementary investigation shall be limited to two times. After the supplementary investigation, the procuratorate recalculated the time limit for examination and prosecution. After the public prosecution section of the procuratorate has completed the examination, it will write a public prosecution and file a public prosecution with the corresponding court. Generally, it is one month to one and a half months, and it will reach five months at the longest. Finally, go to the court. The trial is the final system of the second instance, and the first instance is held within one month after the court accepts it and the sentence is pronounced, which shall not exceed one and a half months at the latest. If it is a case in a remote area, a major criminal group or a fugitive, it can be extended for another month. If the defendant or the party involved in an incidental civil action refuses to accept the judgment of first instance, he may appeal; If the procuratorate believes that the judgment of the first instance is indeed wrong, it can also lodge a protest with the court at the next higher level, and the case will enter the second instance. The trial time limit of the second instance is the same as that of the first instance, and it is also one month, not more than one and a half months. If it is a case in a remote area, a major criminal group or a fugitive crime, it can be extended by another month. If there is no appeal or protest, it usually takes one month to one and a half months, and the longest is two and a half months. If there is a second trial, it usually takes two to three months and the longest is five months. If the court considers that the evidence is insufficient to return to the procuratorate, the time will be extended. To sum up, if a criminal case is not complicated and the case is simple, it will end in five to six months. If it is complicated and returned many times, the longest trial period will be about two years. In practice, the phenomenon of extended detention is very common. If there is such a situation, a lawyer should be hired in time to appeal and apply for bail pending trial, so as to safeguard the legitimate rights of the suspect (defendant). After the verdict is pronounced by the court, the time spent in the detention center is subtracted from the sentenced period. If it is less than one year, the remaining sentence will be served in the detention center, and the sentence will generally not be reduced in the detention center. If it is more than one year, it will be sent to different prisons after a period of time according to the length of the remaining sentence. Those who serve their sentences in prison and meet the conditions of commutation, parole and medical parole may apply for commutation, parole and medical parole.