1、对于不属于流窜作案、多次作案、结伙作案的重大嫌疑分子的犯罪嫌疑人和被告人，其刑事拘留期限为3日，特殊情况下拘留期限可以延长1至4日，加上检察院核准的时间为自接到公安机关提请批准逮捕书后的7日内，即刑事拘留的期限或可长达14日。

2、对于流窜作案、多次作案、结伙作案的重大嫌疑分子，刑事拘留期限可以延长至30日，加上检察院核准的时间为自接到公安机关提请批准逮捕书后的7日内，即对于流窜作案、多次作案、结伙作案的重大嫌疑分子的刑事拘留期限或可长达37日。

1. For suspect and defendants who are not major suspects who commit crimes from place to place, repeatedly or in groups, the criminal detention period is 3 days. Under special circumstances, the detention period can be extended by 1 to 4 days. In addition, the time approved by the procuratorate is within 7 days after receiving the public security organ's request for approval of arrest, that is, the criminal detention period may be up to 14 days.

2. For major suspects who commit crimes from place to place, commit crimes many times, or commit crimes in groups, the criminal detention period can be extended to 30 days, plus the time approved by the procuratorate is within 7 days after receiving the letter of approval from the public security organ, that is, for major suspects who commit crimes from place to place, commit crimes many times, or commit crimes in groups, the criminal detention period may be up to 37 days.