Joke Collection Website - Blessing messages - How does the mobile phone know to split two short messages from a short message larger than 70 words and assemble them?

How does the mobile phone know to split two short messages from a short message larger than 70 words and assemble them?

The number of bytes judged by the mobile phone is the same as that set by the computer. Just set the maximum number of bytes and the number of bytes per message.

The split and assembly of SMS is caused by the upgrade of communication equipment of service providers such as China Mobile and China Unicom. The original communication device does not support short message bytes that are too long.