Ezhou Tonglei diamond co.,ltd is located in Yanji Town. Known as " the No.1 Diamond Cutting Tool Town of China", Yanji Town is the birthplace of Chinese diamond cutting tool. Our is a comprehensive company specialized in researching and producing single-crystal synthetic diamond and diamond cutting tools. As long years research and development in materials and formula, quality and stability of our cutting tool product earn top rank in the industry. With great con...