Legal basis: Criminal Procedure Law of People's Republic of China (PRC).
Article 159 A criminal suspect may be sentenced to fixed-term imprisonment of not less than 10 years. If the extended period stipulated in Article 158 of this Law expires and the investigation is terminated, it may be extended for another two months with the approval or decision of the people's procuratorate of a province, autonomous region or municipality directly under the Central Government.
Article 160 In the course of investigation, if a criminal suspect is found to have committed other major criminal acts, the time limit for investigation and detention shall be recalculated from the date of discovery in accordance with the provisions of Article 156 of this Law. If a criminal suspect does not give his real name and address and his identity is unknown, his identity shall be investigated, and the period of investigation and detention shall be counted from the date when his identity is ascertained, but the investigation and evidence collection of his criminal acts shall not be stopped. If the facts of the crime are clear, the evidence is true and sufficient, and it is really impossible to find out his identity, he can also sue and try according to his self-reported name.
Article 161 If a defense lawyer makes a request before the investigation of a case is completed, the investigation organ shall listen to the opinions of the defense lawyer and record them. If a defense lawyer puts forward a written opinion, it shall attach a volume.