There are sending format requirements when sending group messages. This is the attribute rule of the operator's information channel. Generally, it must carry a signature and the unsubscription of advertising information back to T. In addition, the sentences must be next to each other. Interlaced editing is not allowed, which can easily cause many spaces to turn into question marks. All it takes is a solid Chinese bracket to appear in the overall content to distinguish signatures. The content of long text messages should not exceed 300 characters. No one will read messages that are too long. In short, the editing of information must be formal and true, and do not involve illegal and sensitive information.