I have had multiple packages coming from China with tracking numbers starting with AM, these packages do not show as valid in the destination country. I have been told all international tracking codes start with either U, L, C or E. Are the tracking numbers fake?

Tracking number is 03017984635- Where is my parcel? When will I get it?
Tracking number is 03057209269- Where is my parcel? When will I get it?
Tracking number is 03068984634- Where is my parcel? When will I get it?
Tracking number is 03069874884- Where is my parcel? When will I get it?
Tracking number is RE146927823EN- Where is my parcel? When will I get it?
Tracking number is 03107176954- Where is my parcel? When will I get it?
Tracking number is 03107616885- Where is my parcel? When will I get it?
Tracking number is 70876199019- Where is my parcel? When will I get it?
Tracking number is 03114225633- Where is my parcel? When will I get it?
Tracking number is 03108885209- Where is my parcel? When will I get it?
Tracking number is 03114234927- Where is my parcel? When will I get it?
Tracking number is 03130836948- Where is my parcel? When will I get it?
Tracking number is 03140055800- Where is my parcel? When will I get it?
Tracking number is 03017984635- Where is my parcel? When will I get it?

Seller has only provided fed ex tracking number. So tracking will not show any overseas movement. It will only start showing updates once package clears us customs and fed ex receives package. I have asked seller multiple times for China post tracking number which they keep replying back stating that my tracking number is fed ex tracking number. Is it possible to track package’s shipping from China post with fed ex tracking number? Or how do I go about getting China post tracking number if seller will not provide it?