High-Yield Water-Based Drilling Fluid Grade Hydroxyethyl Cellulose (HEC) Company Profile Shanghai Prior Chemical Scientific And Technical Co., Ltd. (Grade A Tax Credit) was established in 2016 and specializes in the international trade and supply of industrial chemical materials. Leveraging resources associated with China North Industries Group Corporation (NORINCO GROUP), the company supplies a broad portfolio of cellulose and specialty chemicals, including Hydroxyethyl