ABOUT US Sino Seiko Co., Limited (SINOSEIKO for short) is a trading company that specializes in trading of Polycrystalline Diamond (PCD) and related products. was established in 2019 and is located in the Economic and Technological Development Zone of Zhongyuan Economic Zone, Zhengzhou, Henan Province. It is a member company of Sino Emotion Industries Co., Limited. SINOSEIKO is devoted to satisfying customers wit...