6月5日，国家计委决定再次提高国内成品油价格。从去年11月以来，我国已4次提高汽、柴油零售价格。国内成品油价格为何不以提高？油价提高及油价形成机制的改革会对石化企业产生怎样的影响？日前业内人士分析说，促成国内成品油价格不断提高的原因主要有三个：一是缓解国际原油 On June 5, the State Planning Commission decided to increase domestic refined oil prices again. Since November last year, China has raised retail prices of gasoline and diesel four times. Why does the domestic refined oil price not improve? How will the reform of oil prices and oil price reform mechanisms affect petrochemical companies? According to industry analysts recently, there are three main reasons for the continuous improvement of domestic refined oil prices: First, to ease international crude oil