Detained 16 days ~

According to Chinese laws and my experience in handling cases, your friend was criminally detained on suspicion of a criminal offence. At present, it does not belong to extended detention. In criminal cases, criminal detention can last up to 37 days, during which it will be turned into arrest. Then there is a long period of detention until the court makes a judgment. This period usually lasts from six months to one year. At present, family members can hire professional criminal defense lawyers to provide legal help and defense. Including the visit you mentioned. However, it is not yet possible to access the case materials. You have to wait until the trial stage. This is very important. It is suggested to entrust a professional criminal defense lawyer to provide legal help and defense as soon as possible. You can contact me further if you don't understand. Good luck.