With the strategy recombination of asset in the field of Chinese petrol-chemical and the entrance of china to WTO, it has changed the old facet of monopolization and formed the new one of competition.

• 中国石油石化行业的战略性资产重组以及中国入世后世界石油巨头的陆续进入，改变了过去行业垄断的旧局面，形成了新的竞争格局。