At present, schools and units often engage in some activities on a special day, which is also to enliven everyone's emotions and to commemorate a certain day. For example, when the May 4th Youth Day comes at school, the school may organize some outings for members of the Youth League. During the activity, some games may be held and some souvenirs may be purchased. Then such souvenirs should be meaningful. So just buy some pens and notebooks. Wait a minute. This thing.