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

2016-12-17 00: 00: 00.0 19:26:00 Shenzhen Post Express Logistics Longhua Center Sales Department Received

2016-12-17 00: 00: 00.0 20:44:35 Shenzhen Post express logistics company Longhua Center business department to leave the processing center, sent to Shenzhen

2016-12-18 00: 00: 00.0 11:46:13 Shenzhen to reach the processing center, from Shenzhen Post Express logistics company Longhua Center Sales Department

2016-12-18 00: 00: 00.0 11:46:39 Shenzhen City left the processing center, sent to USORDR = ISC CHICAGO IL (USPS)

2. Here is another tracking of your parcel:
International Mail# LT601635783CN Tracking Result
Summary
Tracking number Origin Destination Status
LT601635783CN CHINA UNITED STATES On route
History Detail
Local date/time Activity Location Remarks
17-Dec-2016 19:26 Received by Post Office 518109
18-Dec-2016 11:46 Departure export customs SHENZHEN EMS

3. So according to the above tracking your parcel is On Route/In Transit to your country USA Chicago.

4. If you want to know exactly where is the parcel it's impossible because there is no electronic devise attach to your parcel and can not be follow by GPS.

5. Because you parcel was mail during the Holiday Season and because of the Smog in China this might have contributed in delaying your parcel.

6. Parcel to USA can take between 15 to 35 days to be deliver.

7. At your end what needs to happen is USPS scan the parcel on arrival or when they have time to do it.

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

Thanks.