Where can I see the short message from Lucheng Detention Center to my family?

Postal express. If the detention center sends a letter by express mail, you can go to China Post for enquiry. The guards belong to the state political and legal organs and are mailed by official letter. Postal service is a tracked state-owned enterprise with a certain security character. In China, state organs, institutions, organizations, schools and government departments all use postal express if they need to send letters.