1. This is the full tracking of your parcel from China Post EMS site:

2016-12-08 00: 00: 00.0 22:07:00 Courier bulk receiving office to send and receive

2016-12-08 00: 00: 00.0 23:13:00 Courier Delivery Departure Processing Center for Shanghai Post Express Logistics

2016-12-08 00: 00: 00.0 23:16:52 Courier delivery department to leave the processing center, sent to Shanghai

2016-12-08 00: 00: 00.0 23:17:21 Shanghai arrival processing center, from the bulk delivery office

2016-12-09 00: 00: 00.0 03:33:06 Shanghai to leave the processing center, sent to USORDF = ISC CHICAGO IL (USPS)

2. Your parcel is On Route / In Transit to USA Chicago.

3. Seller is right some parcels where delayed. When your parcel was sent it was not normal condition. Because:

Holiday Season
China Post has too many parcels to send overseas
Not enough room on the Aircraft for parcels
Smog in China delaying Aircraft or cancelling them
Rescheduling of mail bags
Chicago overwhelming of parcel incoming from Overseas.

4. If by 19 Jan you can not see any movement on the USPS site, then maybe it would be time to think about opening a dispute for non reception of Parcel.

5. Just continue to track your parcel on the USPS site for any new movement.

Thanks.