BEIJING TOPTECH CONSTRUCTION TECHNOLOGY CO., LTD.
Address：Rm 5A, Building #1, FengLinLvZhou, Chaoyang Dist., Beijing, P.R.China
Post Code：100025 
Tel：            86-10-85913261 / 85913262
Fax：           86-10-85913262 
Website：     http://www.toptechchina.com
E-mail：       toptech_sales@163.com