What's the difference between a letter from Fetion and an ordinary message?

First, Fetion doesn't charge for sending text messages.

Second, there is no essential difference between the two short messages, mainly depending on the other party's mobile phone.

In other words, if my mobile phone supports long messages, you can send short messages. If my mobile phone can't receive a long short message (because a short message in communication is limited to 70 words, which is more than adding money, but Fetion doesn't involve charging, and some mobile phones are 70 words when online), then you may not receive some content when sending a long short message, or it will become an ordinary short message (split).