The relevant laws stipulate the Criminal Code of People's Republic of China (PRC).
Article 305 In criminal proceedings, witnesses, expert witnesses, recorders and translators who intentionally make false proofs, expert appraisals, records and translations of important cases with the intention of framing others or concealing criminal evidence shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention; If the circumstances are serious, they shall be sentenced to fixed-term imprisonment of not less than three years but not more than seven years.
Article 306 In criminal proceedings, defenders and agents ad litem who destroy or forge evidence, help the parties to destroy or forge evidence, threaten or induce witnesses to change their testimony of facts or commit perjury shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention; If the circumstances are serious, they shall be sentenced to fixed-term imprisonment of not less than three years but not more than seven years.
Witness testimony or other evidence provided, presented or quoted by defenders or agents ad litem is inaccurate, not intentionally forged, and does not belong to forged evidence.
Article 307 Whoever prevents a witness from testifying or instructs others to commit perjury by violence, threat or bribery shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention; If the circumstances are serious, they shall be sentenced to fixed-term imprisonment of not less than three years but not more than seven years.
Whoever helps a party destroy or forge evidence, if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention.
Any judicial officer who commits the crimes mentioned in the preceding two paragraphs shall be given a heavier punishment.
Criminal Procedure Law of the People's Republic of China
Article 18 Criminal cases shall be investigated by public security organs, except as otherwise provided by law.
Crimes of corruption and bribery, crimes of dereliction of duty by state functionaries, crimes of illegal detention, crimes of extorting confessions by state functionaries by torture, crimes of retaliation and framing, crimes of illegal search, and crimes of infringing citizens' democratic rights shall be investigated by the people's procuratorate. If other major criminal cases committed by state functionaries by taking advantage of their functions and powers need to be directly accepted by the people's procuratorate, they may be placed on file for investigation upon the decision of the people's procuratorate at or above the provincial level.
Cases of private prosecution are directly accepted by the people's courts.