You can entrust a lawyer to defend. Lawyers can apply for bail pending trial, meet the parties, understand the basic case, provide legal advice to the parties, and file complaints and accusations on their behalf. Lawyers can put forward defense opinions to the judicial organs orally or in writing, protect the legitimate rights and interests of the parties to the maximum extent, and strive for a lighter, mitigated punishment or probation for the parties.
Being taken away by the public security bureau is called summons or compulsory summons, and the longest time is no more than 24 hours. Since it hasn't come out yet, it means that it has been criminally detained and should be suspected of a criminal offence. It is recommended to entrust a lawyer to intervene as soon as possible.