There are some method you can try when you have difficulty:
1. Read the help information by click the links in the left;
2. Click here"feedback"Submit your question to administrators;
3. Contact Us, We would respond to you as soon as possible.

Call:86(512)5576-0075
Email:greatech@hotmail.com
Fax:86(512)5675-5706
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Address:Nanjing East Road, Tangqiao Town, Zhangjiagang, Jiangsu, China Postcode:215611