How many days can a criminal case be summoned at most?

I am a lawyer in Suzhou. If there is no problem within 24 hours, I will let people go. If there is a problem, put the person in criminal detention first, and then do further investigation after detention. If you don't come out within 24 hours, it should be criminal detention. Once in criminal detention, if your friend is involved in the case, you don't know when you will meet someone. It is recommended to consult in person or entrust a lawyer.