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Jinan Yudong Technology Development Co., Ltd. is a comprehensive chemical enterprise that integrates scientific research, production, and sales. Since its establishment in 2002, the company has been committed to researching, developing, and producing
Shanghai Guangji Industrial Co., Ltd. was established in 2008 (hereinafter referred to as Guangji Industrial), which is a high-tech outward oriented enterprise integrating deep processing of concave convex rod products, development of new technologic