Petromentor's Open Course “Accident Investigation and Root Analysis” was held in Beijing on April 21th and 22th, 2011. This course invited staff from CNODC, GWDC, SIPC and so on. All the people were satisfied with the effect of this course.

The content of this course included the definition and classification of accidents, reasons and effects of accidents and so on. The teacher has deep theoretical background, rich practicing experience and long time's teaching experience. He is very good at effectively mobilizing the enthusiasm of the participants, and gained the praise of the participants.