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        After-Sales Service Promise:

        1. Our products past all kinds of damage test, which are qualified with stable performance.
        2. Within 1 year, any damage by normal using will charge from us and repair for whole life time.
        3. Using method, technology, theory will be trained to learned without any charge.
        4. Technology support and upgrade is available for whole using.
        5. 24 hours respond to your quality problem is our promise.