Shanghai YIYAN diamond LTD.co, is a collection of production and sales as one of diamond tools and glass tool manufacturers in china, our company has a perfect r&d and manufacturing capability, well-equipt, advanced technology, excellent and complete workmanship,the produced products with high quality and competitive price.

Our company is located in the international metropolis-Shanghai.And has convenienttraffic.With the development of our company, we will increase investment strength to ...