1. From the situation you described, you should be the suspect's family. The maximum period of criminal detention is 37 days. If you remain in detention after 37 days, you should be arrested. The suspect should have been informed of the arrest, but the family members may not have received the notice so soon. According to Chinese law, family members can't meet the criminal suspect before the judgment takes effect, but lawyers can meet the criminal suspect. If economic conditions permit, it is best to hire a lawyer to intervene and provide legal help or defense.
2. About bail pending trial. In theory, as long as there is no social danger, you can apply for bail pending trial at any stage, but in fact it is very difficult to get bail pending trial after being arrested.
Shanghai criminal lawyer Yan