How to open cornet by SMS

If you know someone's mobile phone number in that cornet trunking network and want to join this cornet trunking network, you can send a short message to join, and write a short message "DHSQ# group # applicant's name # any mobile phone number in the package" and send it to 10086. The other party's confirmer will reply to "JR# other party's cornet" within 48 hours after receiving the confirmation message to confirm that you agree to join.