Our offices in China will be closed from September 15 to 17, 2016 (Thursday-Saturday), to observe the Chinese Mid-autumn Festival. Meanwhile we will be working on September 18, so if you have any questions, don't hesitate to contact us at:
ZWCAD Technical Support: firstname.lastname@example.org
ZW3D Technical Support: email@example.com
We will reply to you as soon as possible, thanks.