What kind of domestic suit can Guoyu's loose-leaf paper be packed in?

Guoyu's loose-leaf paper can be packed in ordinary domestic sets. Guoyu is a famous loose-leaf paper brand, and its specifications and dimensions are the same as those of conventional loose-leaf paper, which can be placed in a general domestic loose-leaf paper sleeve. The common loose-leaf paper suit brands in China are Chen Guang, Deli, True Color, Broad and so on. The specifications and sizes of loose-leaf paper sets of these brands are the same as those of Guoyu loose-leaf paper, and they are compatible with each other.