Expert Certification M15-M100 Scientific and technological achievements appraisal meeting and appraisal certificate 2022-12-06 Previous：Senior famous expert Zhu Changjiu, academician Ren Binrang and other judges comprehensively reviewed the industrialization of Chen Maogao's methanol core mother liquorNext：Minister He Guangyuan of the former machinery Department inspected and guided the company's product research and development