Jereh and S&S (Stewart & Stevenson Service, Inc ) signed a contract of entrusting Jereh to provide after-sales service for S&S equipment sold in China. At the end of January, 2002, when S&S engineers did the maintenance for Tuhua oilfield, our technicians happened to complete resumption of the ALLISON9000 transmissions for Tuhua. S&S engineers were impressed so much by the professional techniques of our people that they immediately changed their minds and asked our technicians to provide after-sale service for S&S. In March of 2002, the frame of one S&S frac unit in Kelamayi Oilfield was suddenly broken when working During maintenance by others, the steel cable for lifting the truck was pulled apart and the transmissions was also damaged. S&S originally appointed other company resume it and they tried for twice, but failed.Under such circumstances, S&S asked our technicians to do maintenance for them. Depending on the rich experience and professional expertise, it only took one week our people to complete the maintenance. (including the delivery of importing parts from abroad) After test, all functions of this transmission have been completely resumed and all the performances met the standard technical requirements. Currently, this frac unit is working again! Jereh just signed a new maintenance contract with S&S. Now our engineers are providing maintenance service for S&S equipments in Changqing Oilfield.