How to inform family members of detention?

Legal analysis: 1. Inform the family members of the detention period, time and place in person if conditions permit; 2. If the family members are not present, they shall be notified by telephone, text message or fax immediately after detention; 3. If the identity is unknown, the contact information of family members is refused, or the notice cannot be given due to force majeure such as natural disasters, the notice may not be given;

Legal basis: Article 97 of the Law of People's Republic of China (PRC) on Public Security Administration Punishment, the public security organ shall announce the decision on public security administration punishment to the punished person and deliver it to the punished person on the spot; If it cannot be announced to the punished person on the spot, it shall be served on the punished person within 2 days. If it is decided to give administrative detention, it shall promptly notify the family members of the punished person.