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The folder before transforming has very sharp chamfer which brings inconvenience to people. Especially when primary school students are sorting papers, it is difficult for them to put slipcase into the folder. Besides, it is very easy to hurt their hands. Even if adults use it, they also need to make an effort to turn over it if they want to put a slipcase into the folder. After modifying, it becomes more convenient and simple to open the folder. And your hands won't get hurt. In addition, you can simply put the slipcase into the folder. All these advantages reduce the parents’ worries about their children.
Jiafa Lin Jinbo Cai Jingbin Tang