Zhengzhou Sino-Crystal Diamond Co.,Ltd.(SZSE:300064) dropped from Shenzhen Stock Exchange A Share Index

Zhengzhou Sino-Crystal Diamond Co.,Ltd. is a China-based company principally engaged in the research, development, manufacture and distribution of superhard materials and superhard material products. The Company's main products include graphite ore, artificial diamonds and raw and auxiliary materials, large single crystal diamond and jewelry, diamond powder, micron diamond wires and superhard abrasive tools, among others. The Company distributes its products in domestic market and to overseas markets.