八五"期间，总公司把多种经营列为石油工业发展的三大战略之一，石油多种经营事业快速崛起。多种经营经过八五期间的发展，管理工作开始上路并逐步趋于成熟，对项目投资管理的认识也进一步深化，投入讲产出，投资追回报，成为石油多种经营投资项目管理的中心。在计划经济体制下 During the Eighth Five-Year Plan period, the head office listed diversified operations as one of the three major strategies for the development of the petroleum industry, and the diversified business of petroleum rose rapidly. After diversified operations developed during the 8th five-year period, the management work began to take off and gradually tended to Mature, deepening understanding of project investment management, investing in output, investing in return, and becoming the center of oil diversified investment project management.