YUN JIANN build mechanical Limited Company predecessor establish along YUN SUNG mechanical Limited Company for on A.D.1983. In order to make ( traditional milling machine ) It is a main fact. Company improvement of piece meet the requirement of customer already with spirit that keep improving. In A.D.1995 company research and develop bed platform vertical milling machine, Because in conformity with customer's different demands on work, The calculation that can be perfect perfect degree of the products on the work is processed, It is more perfect to enable processing the finished product. In 2007, Company the new product of the development design of segment for letting the customer be able to have more product selects not, the company develops one meter 1 CNC to synthesize to slice to pare to process machine