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Beijing Yihai Hengtong Technology Development Co., Ltd.;  
Tel:010-82744900-8806  
Fax:010-82744900-8801
Phone:18611132943     
Q  Q: 3192981679
Skype:Hotop Technology
Zip code:100016
Email:[email protected]vers.com.cn
Add: No.18, Jiuxianqiao Middle Road, Chaoyang District