On August 19, 2020, the notice from CSU INTERNATIONAL CERTIFICATION CO., LTD., shows that Shandong Deshunyuan Petroleum Sci& Tech. Co., Ltd has successfully passed the second external supervision and audit of quality, environment and occupational health and safety management system certification. The management systems meet the requirements of standard, therefore the company will continue to maintain the certifications registration qualification, and the certificates continue to be valid as well.