It is generally used to commemorate the teacher-student relationship for several years, which is very memorable.
Souvenirs can be used for many purposes, such as commemorating a person, an event, a meeting or a personal relationship. In order to fully and vividly illustrate the application of souvenirs in our lives, here are a few examples. For example, Xiao Zhang travels to Yunnan. After his trip, Xiao Zhang brought some small gifts with Yunnan characteristics as souvenirs of his trip to Yunnan. These small gifts bought in Yunnan are tourist souvenirs at this time. For example, Xiao Li's unit is going to hold an international conference, and the guests invited by the conference come from all over the world. So Xiao Li's unit has prepared some gifts with China characteristics.