21. Articles 64 and 71 of the CPL stipulate that, in case of detention or arrest, the detained or arrested person &apos; s family or work unit must be informed of the reason for the detention or arrest and the whereabouts within 24 hours.
21. 《刑事诉讼法》第六十四条和第七十一条规定，拘留或逮捕后，应当把被拘留或逮捕的原因和羁押的处所，在二十四小时内通知被拘留人或被逮捕人的家属或者他的所在单位。