Invite customers to attend the meeting.

Dear xxx: Our company will hold a seminar on xx on X, X, and we invite you to attend. Your presence will be our honor. Thank you xxx

Brief introduction of short message service (SMS):

As a part of the unified communication service plan, the number of characters that users can send and receive short messages is English 160 characters, digital characters or Chinese 70 characters. Short message is a telecommunication service in digital mobile communication system. It is a non-real-time and non-voice data communication service to transmit text or digital short messages through the signaling channel and signaling network of mobile communication system.