China entering WTO will have great effects on the upstream business( oil and gas exploration and development), oil refining and chemical engineering enterprises, petroleum marketing system and petroleum technical service and trade.

• 加入世界贸易组织将对我国石油石化工业的上游核心业务（气勘探与开发）炼化企业、油销售系统以及石油技术服务贸易产生重大影响。