On July 18, 2019, Shandong Deshunyuan Petroleum Sci & Tech Co., Ltd has passed the renewal review of PetroChina Product Quality Accreditation and obtained the new certificate. There are 3 new accredited products : high temperature resistant starch SHR-1, nano-silica NS-1 and detergent RH. The addition of the 3 new products increases the number of accredited products to 47.
