Send a short message to the teacher for blessing. Do you want to sign? Is it impolite not to sign?

Teachers generally have the concept of intimacy and closeness. For example, once I sent a holiday greeting to my teacher without signature, and the teachers replied very little, which was official. By contrast, in the case of my signature, it is different.

Signing so-and-so only means telling each other who you are; A respectful signature of so-and-so not only tells the other party who this letter belongs to, but also shows respect and respect for the other party.

Extended data:

Signature XXX is mostly used among peers, or in short messages sent to younger generations and subordinates, and is not suitable for elders and leaders. The signature from XXX is used to send messages to elders and leaders, not to peers and younger generations.

If you sign so-and-so in the text message, it means that you and the recipient are close peers or the other person is your junior, then there is not much respect in the text message, so you can casually. But if it's from someone, it means it's sent to someone who needs respect, such as a leader, so always pay attention to using honorific words in short messages, not too casually.