Yunnan BeiFang KunWu Optoelectro Technology Development Co., Ltd.         
201 sub-building,No.31 Jiao Chang Dong Road Kunming Yunnan,China 
P.C  ：650224    Tel  ：0871-5105203                 Fax    :0871-5105817  
Web：http://www.bkocn.com    E_mail: sale@bkocn.com