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Recycled paper is used instead of the pen's housing to save plastic. The material of the pen is mainly polystyrene and is difficult to degrade. The design can be placed flat on the table, making it difficult to fall on the ground, thus reducing the number of pen changes. Tear off the paper on the head with your hands, and then roll the rest up and stick it on to form a paper pen. Many poor people can not afford a pen, will only use the pen core to write, paper has a certain thickness, do not need the pen shell, the cost will be reduced.