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Change of E-mail / Website Notification

TET's e-mail address has been changed to: starting from today. The current e-mail address will expire after July 19th, 2020. During the mail conversion period, the new and current mailboxes are both available.
In the meantime, TET has upgraded the official website as:

Thank you for your cooperation. TET will continue to provide customers with the best quality service and professional technology in the future.

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