Gree is one of the largest air conditioner producers for home use in the world, whom is dedicate into the high-end equipment manufacturing and industrial products research. This bidding is their first step for upgrading the core parts performance machined by the MAKINO machine tool. As for this time 5 kinds of parts will be optimized and the other 4 for next time and may choose the same procedures for the tools purchase of this time according to the actual machining results. After the evaluation from the engineering department, the final candidates are Coromant, Walter and Seco. All the suppliers must submit the quotations for the packages tools and single tools.