ZHENGZHOU GREATWALL SCIENTIFIC INDUSTRIAL AND TRADE CO., LTD.

Zhengzhou Changcheng science, industry and Trade Co., Ltd., established in 1988, is a scientific and technological innovation enterprise integrating R & D, manufacturing and service. The company's products occupy a high market share in enterprises, universities and research institutes in the fields of biology, chemical industry, pharmacy, electronic equipment and new materials. Its customers are a...