Why the tracking number i received is invalid?

Invalid tracking numbers could be caused by following reasons: 

1.The shipping company has not updated the recent delivery information to their website yet. Please wait more1-2 days and try again.

2. The parcel has been delivered for a long time ago. Some shipping companies will remove the tracking code history.

3. The tracking number not correct. Please contact our customer service for the right number.
 

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