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- https://www.qtc-hk.com/contact-us/ (25 May 2019)
- https://www.qtc-hk.com/contact-us/ (25 May 2019)
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(852) 2185 0900
https://www.qtc-hk.com/contact-us/ (25 May 2019)
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(852) 2687 6752
https://www.qtc-hk.com/contact-us/ (25 May 2019)