When did the news of the prison family bridge arrive?

Prison Bridge SMS receives SMS twice a week. Prison Bridge text messages can't be sent every day. There is a short message platform for prisoners in the prison, and two short messages are allowed every week. The content of the short message must be approved by the police. The service system is divided into two parts: SMS input foreground and receiving and auditing background management. When sending a short message, the prisoner first writes down the content and mobile phone number to be sent, gives it to the sender designated by the prison, and enters it into the front desk through short messages located in each prison area. Short messages can be transmitted to the background management terminal of the office building through the network.