The company of Shanghai He Mao, it was established at 2001, it has introduced some first level brand of printing products into China market. In 20 years of cultivate, the share in China high-end market for the world's first level brand printing material has been achieved about 70%. Due to the experiences which the company has been collected during 20 years, also the background of the owner (who was studying steel technology) we launched the independent innovation brand AD doctor blades as began in 2010, the main difference was that: