What should I pay attention to when sending a text message invitation to my teacher?

Short message time-it is impolite to interrupt during the general break;

Appropriate language-older teachers need honorifics, and generally young teachers who have a good relationship with them can be easy-going.

Write down the time and place-whether it is an invitation or a text message (it is best to send an invitation in advance for very formal occasions), you should write down the time and place so that the other party has room for consideration.