wholesale Polyamide Copolymer Our History Our Factory Changyu 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 Product The main products are zirconia, zirconium oxychloride, nano zirconia powder materials, long carbon chain special nylon materials, long carbon chain dibasic acids, long carbon chain diols, etc. Product Application Our products are widely used in automobiles, home appliances, communications, and smart wearables, high-performance ceramics, medical and pharmaceuticals and other fields.