Polyamide 612 Resin factory Our HistoryOur FactoryChangyu Holding Group Co., Ltd. (hereinafter referred to as Changyu Group) is located in Zibo National New&High-tech Industrial Development Zone, Zibo City, Shandong Province, a famous historical and cultural city in China.Changyu Group is an enterprise group with high-end new materials and fine chemicals as its main business.Our...