Why can't my mobile phone send short messages when doing mobile business? The text message was "Your instruction was wrong"

Hello, thank you for using China Mobile Communication. If you are a customer of Jiangsu Mobile, your mobile phone shows that the instruction you sent is wrong, which means that the code you sent is incorrect. You can try to send "Call Check" to 10086. If you still prompt that the instruction sent is wrong, it may be that the mobile phone automatically added text when sending the short message. Check whether similar software is installed on the phone. For your reference.