1. Thank you: You can carve some sentences thanking teachers for their hard work, such as "Thank you for your hard work and selfless dedication, from students".

2. Teacher's famous sayings: If the teacher has some favorite famous sayings or special beliefs, he can choose to engrave them on a pen, such as "self-improvement, kindness and morality".

3. greetings: you can also carve some greetings, such as "I wish you peace, happiness and health all your life"

4. Names of students and teachers: You can also engrave your and teachers' names and graduation year to record this special moment.

Special days, such as the teacher's birthday or the graduation date of your class, can also be engraved on the pen.

When choosing what words to engrave, the most important thing is to be sincere and be able to express gratitude to the teacher. I hope this gift can help you establish a deeper connection with your teacher.