提高集团经济质量的有效途径沈庆玉８９年以来，吉化集团公司通过联合、兼并，已发展成为一个跨行业、跨地区、多种所有制形式并存的特大型综合性石油化工企业联合体。回顾近几年的改革与发展历程，吉化集团大体经过了三个阶段：第一阶段为集团组建阶段（１９８９——１９... An effective way to improve the economic quality of the Group Shen Qingyu Since 89 years, the Jilin Chemical Group Corporation has developed into an ultra-large-scale integrated petrochemical enterprise conglomerate that has co-existed across industries, regions and diversified forms of ownership through joint mergers and acquisitions. Looking back at the reform and development process in recent years, Jilin Chemical Group has gone through three stages: The first stage is the stage of group formation (1989—19...