There is a small shop in the detention center, which only sells food and daily necessities that meet the requirements, and does not sell contraband. Therefore, family members can "charge" the criminal suspect detained in the detention center, and can only "charge" the criminal suspect, and can't give him cash directly.
"Account entry" means that family members deposit cash into the account of the criminal suspect in the commissary of the detention center, which is similar to saving money in a bank account. Hukou "can only go to the detention center where the criminal suspect is detained.