First, theoretically speaking, public security detention in detention centers generally does not exceed 2 weeks, and criminal detention does not exceed 37 days. However, this is only a theoretical reality. Many people suspected of criminal cases often stay in detention for up to six months. During this time, it may be that the family members who are outside are trying their best to find relationships or spend money to get people out.
Second, the detention center is not allowed to visit. The only thing we can do is to save some money and clothes so that we can eat some meat in it.
Third, most of the prisoners in the detention center are detained by the police, which means they may be small vendors with wine racks and black cars, so they are not particularly dark. I hope you don't worry too much.
The most important thing now is that people outside think more.