Beijing Gang Yan Diamond Products Company
20 Chuang Xin Road,Chang Ping District
Beijing 102200,P.R.China
Tel:86-10-6972-3307 6972-3305 6972-5674
Fax:86-10-6972-3226 6974-5263
www.gangyan-diamond.com
E-mail:info@gangyan-diamond.com