"4M" refers to the scientific application of the four quality management elements of "man", "machine", "material" and "methods".

That is people - to stimulate the greatest sense of competition and quality awareness;Equipment -- maintain the highest utilization rate and utilization rate;Materials -- achieve reasonable input and output;Methods -- the best means and ways to apply.Among them, the essence of "4M" is to highlight the management of people and exert the active role of people.Hitachi enterprises in China and Hitachi enterprises in Japan are basically the same in terms of machines, materials, methods, etc. The only difference is the quality of people.To achieve the international advanced level, manufacturing first-class products, we must focus on the "people" word, "three like" to "four like", "4M" can be in line with the international advanced level