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Shanghai Zhengyi Industrial Co., Ltd. is a specialized company in China that produces industrial cleaning agents and pre-treatment chemicals. The company (formerly known as Donglian Fine Chemical Plant) was established in 1987 and is currently located adjacent to the Shanghai Jinshan National Large-Scale Chemical Industrial Park, with a total investment of 10 million RMB and covering an area of over 40 acres. Through continuous exploration, innovation, and the recruitment of professional talent, the company has accumulated extensive practical experience and possesses strong production and technical capabilities. Among its products, the Zhengyi brand YB-5 room-temperature cleaning agent is a scientific research achievement of the Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences. The Zhengyi series products, including B-1 Oil Remover, B-2 Oil Remover, B-3 Electrolytic Oil Remover, B-4 Degreaser, YB-5 Room-Temperature Cleaning Agent, B-6 Strong Wax Remover, and B-8 Automatic Line Rapid Oil Removal Powder, are highly popular nationwide due to their superior performance, competitive pricing, and satisfactory service. With a monthly sales volume exceeding 1,000 tons, the company is one of the larger cleaning agent manufacturers in China.

The company operates under standardized management and has a comprehensive marketing system. It has obtained ISO9001:2000 national quality system certification. Adhering to the business philosophy of "credibility first, customers supreme," the company is committed to continuously providing both new and existing clients with updated, superior products and services.