Legal analysis: if it is public security detention, you can visit the detention center, but according to the time and place stipulated by the detention center (the meeting time varies from place to place, and you need to check it locally). If you can't send food, you can send some clothes and other daily necessities. In criminal detention, before the criminal judgment takes effect, family members are not allowed to visit and meet, and lawyers can be entrusted to meet. You can't send food, but you can send some clothes and other daily necessities to the suspect to save some money.
Legal basis: Article 180 of the Interpretation of the Supreme People's Court on the Application of the Civil Procedure Law of People's Republic of China (PRC). After the people's court takes detention measures against a detainee, it shall notify his family members within 24 hours. If it is really impossible to notify or fail to notify on time, it shall be recorded.