Our company is the only independent export office of Renqiu Cheng Yi Chemical Co., Ltd. Renqiu Cheng Yi Chemical Co., Ltd. is a large enterprise engaged in production of gum, PAC and CMC. We have been in oil drilling chemical area for 30 years. We have well-equipped testing equipment and strong technical force and we have ISO, SGS and Intertek Certifications. Our brand VEKN is very famous in China. And this brand also enjoys a good reputation in the world. Our products have been ...