After opening the mi band on your phone, please click the "More" option button in the upper right corner.
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Then please click on the "service" column.
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Then you can see the option of "binding mobile QQ", and click Continue.
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Then please click the "bind QQ health" button at the bottom to continue.
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Then the QQ application will automatically open, log in to QQ and click the "authorize and log in" option.
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After the binding is successful, we can open the QQ application and see the current statistical sports data of mi band in the health room.