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Twine binder is used to bind up pieces of paper into one volume. Its main characteristics are culture related, simpleness and environment friendly. First, from the Western Zhou Dynasty, Chinese used twine to make books with bamboo or paper pages. Therefore, twine and knots became symbols of Chinese culture. Secondly, all users suppose to do are putting paper inside and pressing the upper part once, and then a volume with a knot appears immediately. Users can hang the volume on a pothook as well as untie the knot easily. Finally, twine comes from several plants such as Ramee and Jute, it can be reused many times if the length is suitable.
Mingming Wang, Kunpeng Wang，Jian Chen，Xiumin Lin，Hanchao Li，Yang Li，Lingyan Xie，Jingwen Yu，Yuan Gao，Peinv Xu，Yiyun Xu ，Pan Wang