What gift should I give to a teacher who has a mentoring relationship during the Spring Festival?

In fact, the teacher doesn't expect you to send any big gifts. Going back and seeing more is the best gift. Talk to the teacher more, talk about the present situation, talk about future plans, and talk about the past. If you really want to express your feelings, writing letters is the best, unique and reversible. However, I gave a female teacher a water cup when I was a student. The little card says that your voice is always bad. I gave you a water glass, I hope you can moisten your voice. Then the teacher was moved for a long time, and I will talk about it from time to time.