The place of detention of criminals shall be decided by the case trial organ according to the needs of case trial and supervision. Not based on personal wishes. However, according to Article 9 of the Regulations on Detention Centers, criminals detained in detention centers must temporarily hunt down and escort criminals on the basis of arrest warrants held by detention organs, criminal detention certificates issued by public security organs and state security organs at or above the county level, or certification documents issued by public security organs, state security organs, prisons, reform-through-labour institutions, people's courts and people's procuratorates at or above the county level. If there is no such certificate, or the record of the certificate is inconsistent with the actual situation, it will not be taken into custody.
Article 10 A criminal detained in a detention center shall undergo a health examination, and shall not be detained under any of the following circumstances:
(a) suffering from mental illness or acute infectious diseases;
(2) Suffering from other serious diseases, who may be life-threatening or unable to take care of themselves during detention, except those who are extremely guilty and endanger society;
(3) Women who are pregnant or breast-feeding babies under one year old.