摘要
The introduction of the enterprise＇s internal control system is directly related to some well known exposures of finance and accounting scandals, such as Enron, WorldCom, and Xerox etc.. The U.S. President Bush signed Sarbanes-Oxley Act on July 30, 2002. The 404th term of the act claims that all corporations in the U.S. must establish an internal control system to avoid above mentioned financial and accounting risks. With respect to the requirements of Chinese Securities Supervisory Association and the National Capital Committee, PetroChina established its internal control system in February, 2004. CNPC has also established such a system, and has run very well until now.
